sam-mccall wrote:

This patch introduced a crash on code that clang previously accepted (I'm not 
sure whether the code is correct).

The code is 
https://github.com/nvidia/stdexec/tree/467f4a68ee04f3bb4c35e7a5dd13a3419da160cb,
 building `test/stdexec/algos/adaptors/test_stopped_as_optional.cpp` crashes.

<details>
<summary>Errors prior to crash</summary>

```
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:38:19:
 error: static assertion failed
   38 |     static_assert(ex::sender_in<decltype(snd), empty_env>);
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:38:19:
 note: because 'ex::sender_in<decltype(snd), empty_env>' evaluated to false
./third_party/stdexec/include/stdexec/execution.hpp:824:9: note: because 
'decltype(__impl<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>()())' (aka 
'stdexec::_ERROR_<stdexec::_BAD_SUBSTITUTION_<>, 
stdexec::_WITH_META_FUNCTION_T_<stdexec::__try_value_types_of_t>, 
stdexec::_WITH_TYPES_<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env, 
stdexec::__q<stdexec::__stopped_as_xxx::__stopped_as_optional_impl::__set_value_t>,
 stdexec::__q<stdexec::__compl_sigs::__ensure_concat>>>') does not satisfy 
'__valid_completion_signatures':
  824 |         get_completion_signatures((_Sender&&) __sndr, (_Env&&) __env)
      |         ^
./third_party/stdexec/include/stdexec/execution.hpp:273:5: note: because 
'stdexec::_ERROR_<stdexec::_BAD_SUBSTITUTION_<>, 
stdexec::_WITH_META_FUNCTION_T_<stdexec::__try_value_types_of_t>, 
stdexec::_WITH_TYPES_<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env, 
stdexec::__q<stdexec::__stopped_as_xxx::__stopped_as_optional_impl::__set_value_t>,
 stdexec::__q<stdexec::__compl_sigs::__ensure_concat>>>' does not satisfy '__ok'
  273 |     __ok<_Completions> && __is_instance_of<_Completions, 
completion_signatures>;
      |     ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:243:18: note: because 
'__same_as<__ok_t<_ERROR_<_BAD_SUBSTITUTION_<__mstring<76UL>{"The specified 
meta-function could not be evaluated with the types provided."}>, 
_WITH_META_FUNCTION_T_<stdexec::__try_value_types_of_t>, 
_WITH_TYPES_<__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
empty_env, 
__q<stdexec::__stopped_as_xxx::__stopped_as_optional_impl::__set_value_t>, 
__q<stdexec::__compl_sigs::__ensure_concat> > > >, __msuccess>' evaluated to 
false
  243 |   concept __ok = __same_as<__ok_t<_Arg>, __msuccess>;
      |                  ^
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:51:23: note: 
because '__is_same(stdexec::_ERROR_<stdexec::_BAD_SUBSTITUTION_<>, 
stdexec::_WITH_META_FUNCTION_T_<stdexec::__try_value_types_of_t>, 
stdexec::_WITH_TYPES_<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env, 
stdexec::__q<stdexec::__stopped_as_xxx::__stopped_as_optional_impl::__set_value_t>,
 stdexec::__q<stdexec::__compl_sigs::__ensure_concat> > >, int)' evaluated to 
false
   51 |   concept __same_as = __is_same(_Ap, _Bp);
      |                       ^
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:45:15:
 error: no matching function for call to object of type 'const 
__connect::connect_t'
   45 |     auto op = ex::connect(std::move(snd), 
expect_value_receiver{std::optional<int>{}});
      |               ^~~~~~~~~~~
./third_party/stdexec/include/stdexec/execution.hpp:1471:12: note: candidate 
template ignored: constraints not satisfied [with _Sender = 
__libcpp_remove_reference_t<__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)> &>, 
_Receiver = expect_value_receiver<empty_env, optional<int>>]
 1471 |       auto operator()(_Sender&& __sndr, _Receiver&& __rcvr) const
      |            ^
./third_party/stdexec/include/stdexec/execution.hpp:1468:18: note: because 
'__connectable_with_tag_invoke<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_value_receiver<stdexec::__env::empty_env, 
std::optional<int> > >' evaluated to false
 1468 |         requires __connectable_with_tag_invoke<_Sender, _Receiver>
      |                  ^
./third_party/stdexec/include/stdexec/execution.hpp:1415:7: note: because 
'__connectable_with_tag_invoke_<__tfx_sender<__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
expect_value_receiver<empty_env, optional<int> > >, (anonymous 
namespace)::expect_value_receiver<stdexec::__env::empty_env, std::optional<int> 
> >' evaluated to false
 1415 |       __connectable_with_tag_invoke_<__tfx_sender<_Sender, _Receiver>, 
_Receiver>;
      |       ^
./third_party/stdexec/include/stdexec/execution.hpp:1409:7: note: because 
'sender_in<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
env_of_t<expect_value_receiver<empty_env, optional<int> > > >' evaluated to 
false
 1409 |       sender_in<_Sender, env_of_t<_Receiver>> && //
      |       ^
./third_party/stdexec/include/stdexec/execution.hpp:824:9: note: because 
'decltype(__impl<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>()())' (aka 
'_ERROR_<stdexec::__error__::_UNRECOGNIZED_SENDER_TYPE_<__mstring<134UL>{"The 
given type cannot be used as a[...]"}>, 
stdexec::__error__::_WITH_SENDER_<stdexec::__sexpr<stdexec::__stopped_as_xxx::stopped_as_optional_t,
 stdexec::__, stdexec::__sexpr<stdexec::__transfer_just::transfer_just_t, 
std::tuple<(anonymous namespace)::stopped_scheduler, int>>>>, 
stdexec::__error__::_WITH_ENVIRONMENT_<stdexec::__env::empty_env>>') does not 
satisfy '__valid_completion_signatures':
  824 |         get_completion_signatures((_Sender&&) __sndr, (_Env&&) __env)
      |         ^
./third_party/stdexec/include/stdexec/execution.hpp:273:5: note: because 
'stdexec::_ERROR_<stdexec::__error__::_UNRECOGNIZED_SENDER_TYPE_<>, 
stdexec::__error__::_WITH_SENDER_<stdexec::__sexpr<stdexec::__stopped_as_xxx::stopped_as_optional_t,
 stdexec::__, stdexec::__sexpr<stdexec::__transfer_just::transfer_just_t, 
std::tuple<(anonymous namespace)::stopped_scheduler, int>>>>, 
stdexec::__error__::_WITH_ENVIRONMENT_<stdexec::__env::empty_env>>' does not 
satisfy '__ok'
  273 |     __ok<_Completions> && __is_instance_of<_Completions, 
completion_signatures>;
      |     ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:243:18: note: because 
'__same_as<__ok_t<_ERROR_<_UNRECOGNIZED_SENDER_TYPE_<__mstring<134UL>{"The 
given type cannot be used as a sender with the given environment because the 
attempt to compute the completion signatures failed."}>, 
_WITH_SENDER_<__sexpr<stopped_as_optional_t, __, __sexpr<transfer_just_t, 
tuple<stopped_scheduler, int> > > >, _WITH_ENVIRONMENT_<empty_env> > >, 
__msuccess>' evaluated to false
  243 |   concept __ok = __same_as<__ok_t<_Arg>, __msuccess>;
      |                  ^
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:51:23: note: 
because 
'__is_same(stdexec::_ERROR_<stdexec::__error__::_UNRECOGNIZED_SENDER_TYPE_<>, 
stdexec::__error__::_WITH_SENDER_<stdexec::__sexpr<stdexec::__stopped_as_xxx::stopped_as_optional_t,
 stdexec::__, stdexec::__sexpr<stdexec::__transfer_just::transfer_just_t, 
std::tuple<(anonymous namespace)::stopped_scheduler, int> > > >, 
stdexec::__error__::_WITH_ENVIRONMENT_<stdexec::__env::empty_env> >, int)' 
evaluated to false
   51 |   concept __same_as = __is_same(_Ap, _Bp);
      |                       ^
./third_party/stdexec/include/stdexec/execution.hpp:1469:18: note: and 
'__connectable_with_co_await<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_value_receiver<stdexec::__env::empty_env, 
std::optional<int> > >' evaluated to false
 1469 |               || __connectable_with_co_await<_Sender, _Receiver>
      |                  ^
./third_party/stdexec/include/stdexec/execution.hpp:1419:7: note: because 
'__callable<__connect_awaitable_t, __tfx_sender<__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
expect_value_receiver<empty_env, optional<int> > >, (anonymous 
namespace)::expect_value_receiver<stdexec::__env::empty_env, std::optional<int> 
> >' evaluated to false
 1419 |       __callable<__connect_awaitable_t, __tfx_sender<_Sender, 
_Receiver>, _Receiver>;
      |       ^
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:31:7: note: 
because '((_Fun &&)__fun)((_As &&)__as...)' would be invalid: no matching 
function for call to object of type 
'stdexec::__connect_awaitable_::__connect_awaitable_t'
   31 |       ((_Fun&&) __fun)((_As&&) __as...);    //
      |       ^
./third_party/stdexec/include/stdexec/execution.hpp:1470:18: note: and 
'env_of_t<expect_value_receiver<empty_env, optional<int>>>' (aka 
'stdexec::__env::empty_env') does not satisfy '__is_debug_env'
 1470 |               || __is_debug_env<env_of_t<_Receiver>>
      |                  ^
./third_party/stdexec/include/stdexec/execution.hpp:382:30: note: because 
'tag_invocable<__debug::__is_debug_env_t, stdexec::__env::empty_env>' evaluated 
to false
  382 |     concept __is_debug_env = tag_invocable<__debug::__is_debug_env_t, 
_Env>;
      |                              ^
./third_party/stdexec/include/stdexec/functional.hpp:319:49: note: because 
'tag_invoke((_Tag &&)__tag, (_Args &&)__args...)' would be invalid: no matching 
function for call to 'tag_invoke'
  319 |       requires(_Tag __tag, _Args&&... __args) { tag_invoke((_Tag&&) 
__tag, (_Args&&) __args...); };
      |                                                 ^
In file included from 
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:18:
./third_party/stdexec/include/stdexec/execution.hpp:262:18: error: no matching 
function for call to '__for_all_sigs_'
  262 |         decltype(__compl_sigs::__for_all_sigs_( //
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:301:5: note: in 
instantiation of template type alias '__for_all_sigs' requested here
  301 |     using __g = _Fn<_Args...>;
      |     ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:291:3: note: in 
instantiation of template type alias '__g' requested here
  291 |   using __meval = typename __i<_Ok<_Args...>>::template __g<_Fn, 
_Args...>;
      |   ^
./third_party/stdexec/include/stdexec/execution.hpp:268:5: note: in 
instantiation of template type alias '__meval' requested here
  268 |     using __maybe_for_all_sigs = __meval<__for_all_sigs, _Completions, 
_TaggedTuple, _Variant>;
      |     ^
./third_party/stdexec/include/stdexec/execution.hpp:884:3: note: in 
instantiation of template type alias '__maybe_for_all_sigs' requested here
  884 |   using __only_gather_signal = //
      |   ^
./third_party/stdexec/include/stdexec/execution.hpp:891:3: note: in 
instantiation of template type alias '__only_gather_signal' requested here
  891 |   using __gather_signal = //
      |   ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:301:5: note: in 
instantiation of template type alias '__gather_signal' requested here
  301 |     using __g = _Fn<_Args...>;
      |     ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:291:3: note: in 
instantiation of template type alias '__g' requested here
  291 |   using __meval = typename __i<_Ok<_Args...>>::template __g<_Fn, 
_Args...>;
      |   ^
./third_party/stdexec/include/stdexec/execution.hpp:898:3: note: in 
instantiation of template type alias '__meval' requested here
  898 |   using __gather_completions_for = //
      |   ^
./third_party/stdexec/include/stdexec/execution.hpp:3559:5: note: in 
instantiation of template type alias '__gather_completions_for' requested here
 3559 |     using __result_domain_t = //
      |     ^
./third_party/stdexec/include/stdexec/execution.hpp:3599:27: note: in 
instantiation of template type alias '__result_domain_t' requested here
 3599 |           using _Domain = __result_domain_t<_Set, _Child, _Fun, _Env, 
_Sched>;
      |                           ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: in 
instantiation of function template specialization 
'stdexec::__let::__mk_transform_sender_fn(const stdexec::__env::empty_env 
&)::(anonymous class)::operator()<(lambda at 
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:66:23),
 (anonymous namespace)::fallible_just<int>>' requested here
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:597:21: note: 
in instantiation of template type alias '__call_result_t' requested here
  597 |                  -> __call_result_t<_Fun, _Tag, __minvoke<_Cvref, 
_Captures>...>
      |                     ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: while 
substituting deduced template arguments into function template 'operator()' 
[with _Cvref = stdexec::__cp, _Fun = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:3593:14)]
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:502:10: note: 
in instantiation of template type alias '__call_result_t' requested here
  502 |       -> __call_result_t<__detail::__impl_of<_Sender>, 
__copy_cvref_fn<_Sender>, _ApplyFn> {  //
      |          ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:629:76: note: 
while substituting deduced template arguments into function template 'apply' 
[with _Sender = stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
_ApplyFn = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:3593:14)]
  629 |         -> decltype(STDEXEC_CALL_EXPLICIT_THIS_MEMFN(((_Sender&&) 
__sndr), apply)(
      |                                                                         
   ^
./third_party/stdexec/include/stdexec/execution.hpp:3678:16: note: while 
substituting deduced template arguments into function template 'operator()' 
[with _Sender = stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
_ApplyFn = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:3593:14)]
 3678 |         return __sexpr_apply((_Sender&&) __sndr, 
__mk_transform_sender_fn<__let_t<_Set>>(__env));
      |                ^
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:59:15: note: in 
instantiation of function template specialization 
'stdexec::__let::__let_t<stdexec::__receivers::set_error_t>::transform_sender<stdexec::__sexpr<(lambda
 at ./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |               ^
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:59:9: note: in 
instantiation of requirement here
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:58:7: note: while 
substituting template arguments into constraint expression here
   58 |       requires(_DomainOrTag __tag, _Sender&& __sender, const _Env&... 
__env) {
      |       
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   60 |       };
      |       ~
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:65:10: note: while 
checking the satisfaction of concept 
'__has_transform_sender<stdexec::__let::__let_t<stdexec::__receivers::set_error_t>,
 stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
   65 |       && __has_transform_sender<tag_of_t<_Sender>, _Sender, _Env...>;
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:65:10: note: while 
substituting template arguments into constraint expression here
   65 |       && __has_transform_sender<tag_of_t<_Sender>, _Sender, _Env...>;
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:105:21: note: while 
checking the satisfaction of concept 
'__has_default_transform_sender<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  105 |       if constexpr (__domain::__has_default_transform_sender<_Sender, 
_Env>) {
      |                     
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:59:15: note: in 
instantiation of function template specialization 
'stdexec::default_domain::transform_sender<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |               ^
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:59:9: note: in 
instantiation of requirement here
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:58:7: note: while 
substituting template arguments into constraint expression here
   58 |       requires(_DomainOrTag __tag, _Sender&& __sender, const _Env&... 
__env) {
      |       
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   60 |       };
      |       ~
./third_party/stdexec/include/stdexec/execution.hpp:601:23: note: while 
checking the satisfaction of concept 
'__has_transform_sender<stdexec::default_domain, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  601 |         if constexpr (__domain::__has_transform_sender<_Domain, 
_Sender, _Env...>) {
      |                       
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: in 
instantiation of function template specialization 
'stdexec::__domain::__transform_sender_1::operator()<stdexec::default_domain, 
stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/execution.hpp:617:26: note: in 
instantiation of template type alias '__call_result_t' requested here
  617 |         using _Sender2 = __call_result_t<__transform_sender_1, _Domain, 
_Sender, const _Env&...>;
      |                          ^
./third_party/stdexec/include/stdexec/execution.hpp:682:18: note: in 
instantiation of function template specialization 
'stdexec::__domain::__transform_sender::operator()<stdexec::__domain::__transform_sender,
 stdexec::default_domain, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  682 |           return __domain::__transform_sender()(__domain2, 
std::move(__sndr2), __env);
      |                  ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: in 
instantiation of function template specialization 
'stdexec::dependent_domain::transform_sender(stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)> &&, 
const stdexec::__env::empty_env &)::(anonymous 
class)::operator()<stdexec::__let::__let_t<stdexec::__receivers::set_error_t>, 
(lambda at 
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:66:23),
 (anonymous namespace)::fallible_just<int>>' requested here
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:597:21: note: 
in instantiation of template type alias '__call_result_t' requested here
  597 |                  -> __call_result_t<_Fun, _Tag, __minvoke<_Cvref, 
_Captures>...>
      |                     ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: while 
substituting deduced template arguments into function template 'operator()' 
[with _Cvref = stdexec::__cp, _Fun = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:670:7)]
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:502:10: note: 
in instantiation of template type alias '__call_result_t' requested here
  502 |       -> __call_result_t<__detail::__impl_of<_Sender>, 
__copy_cvref_fn<_Sender>, _ApplyFn> {  //
      |          ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:629:76: note: 
while substituting deduced template arguments into function template 'apply' 
[with _Sender = stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
_ApplyFn = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:670:7)]
  629 |         -> decltype(STDEXEC_CALL_EXPLICIT_THIS_MEMFN(((_Sender&&) 
__sndr), apply)(
      |                                                                         
   ^
./third_party/stdexec/include/stdexec/execution.hpp:668:12: note: while 
substituting deduced template arguments into function template 'operator()' 
[with _Sender = stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
_ApplyFn = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:670:7)]
  668 |     return __sexpr_apply(
      |            ^
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:59:15: note: in 
instantiation of function template specialization 
'stdexec::dependent_domain::transform_sender<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |               ^
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:59:9: note: in 
instantiation of requirement here
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__domain.hpp:58:7: note: while 
substituting template arguments into constraint expression here
   58 |       requires(_DomainOrTag __tag, _Sender&& __sender, const _Env&... 
__env) {
      |       
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   59 |         __tag.transform_sender((_Sender&&) __sender, __env...);
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   60 |       };
      |       ~
./third_party/stdexec/include/stdexec/execution.hpp:601:23: note: while 
checking the satisfaction of concept 
'__has_transform_sender<stdexec::dependent_domain, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  601 |         if constexpr (__domain::__has_transform_sender<_Domain, 
_Sender, _Env...>) {
      |                       
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: in 
instantiation of function template specialization 
'stdexec::__domain::__transform_sender_1::operator()<stdexec::dependent_domain, 
stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/execution.hpp:617:26: note: in 
instantiation of template type alias '__call_result_t' requested here
  617 |         using _Sender2 = __call_result_t<__transform_sender_1, _Domain, 
_Sender, const _Env&...>;
      |                          ^
./third_party/stdexec/include/stdexec/execution.hpp:673:29: note: in 
instantiation of function template specialization 
'stdexec::__domain::__transform_sender::operator()<stdexec::__domain::__transform_sender,
 stdexec::dependent_domain, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  673 |           (_Data&&) __data, __domain::__transform_sender()(*this, 
(_Childs&&) __childs, __env2)...);
      |                             ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: in 
instantiation of function template specialization 
'stdexec::dependent_domain::transform_sender(stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)> &&, 
const stdexec::__env::empty_env &)::(anonymous 
class)::operator()<stdexec::__stopped_as_xxx::stopped_as_optional_t, 
stdexec::__, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>>' 
requested here
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:597:21: note: 
in instantiation of template type alias '__call_result_t' requested here
  597 |                  -> __call_result_t<_Fun, _Tag, __minvoke<_Cvref, 
_Captures>...>
      |                     ^
./third_party/stdexec/include/stdexec/__detail/__meta.hpp:753:36: note: while 
substituting deduced template arguments into function template 'operator()' 
[with _Cvref = stdexec::__cp, _Fun = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:670:7)]
  753 |   using __call_result_t = 
decltype(__declval<_Fun>()(__declval<_As>()...));
      |                                    ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:502:10: note: 
in instantiation of template type alias '__call_result_t' requested here
  502 |       -> __call_result_t<__detail::__impl_of<_Sender>, 
__copy_cvref_fn<_Sender>, _ApplyFn> {  //
      |          ^
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:629:76: note: 
while substituting deduced template arguments into function template 'apply' 
[with _Sender = stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
_ApplyFn = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:670:7)]
  629 |         -> decltype(STDEXEC_CALL_EXPLICIT_THIS_MEMFN(((_Sender&&) 
__sndr), apply)(
      |                                                                         
   ^
./third_party/stdexec/include/stdexec/execution.hpp:668:12: note: while 
substituting deduced template arguments into function template 'operator()' 
[with _Sender = stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
_ApplyFn = (lambda at 
./third_party/stdexec/include/stdexec/execution.hpp:670:7)]
  668 |     return __sexpr_apply(
      |            ^
./third_party/stdexec/include/stdexec/execution.hpp:640:37: note: in 
instantiation of function template specialization 
'stdexec::dependent_domain::transform_sender<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
  640 |           __dom, dependent_domain().transform_sender((_Sender&&) 
__sndr, __env), __env);
      |                                     ^
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:31:7: note: in 
instantiation of function template specialization 
'stdexec::__domain::__transform_dependent_sender::operator()<stdexec::default_domain,
 stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
   31 |       ((_Fun&&) __fun)((_As&&) __as...);    //
      |       ^
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:31:7: note: in 
instantiation of requirement here
   31 |       ((_Fun&&) __fun)((_As&&) __as...);    //
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:30:5: note: while 
substituting template arguments into constraint expression here
   30 |     requires(_Fun&& __fun, _As&&... __as) { //
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   31 |       ((_Fun&&) __fun)((_As&&) __as...);    //
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   32 |     };
      |     ~
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:35:5: note: while 
checking the satisfaction of concept '__callable<stdexec::transform_sender_t, 
stdexec::default_domain, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
   35 |     __callable<_Fun, _As...> && //
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/__detail/__concepts.hpp:35:5: note: while 
substituting template arguments into constraint expression here
   35 |     __callable<_Fun, _As...> && //
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/execution.hpp:1443:14: note: while 
checking the satisfaction of concept 
'__nothrow_callable<stdexec::transform_sender_t, stdexec::default_domain, 
stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
stdexec::__env::empty_env>' requested here
 1443 |           && __nothrow_callable<transform_sender_t, _Domain, _Sender, 
env_of_t<_Receiver&>>;
      |              
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/execution.hpp:1465:40: note: in 
instantiation of function template specialization 
'stdexec::__connect::connect_t::__select_impl<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>' requested here
 1465 |       using __select_impl_t = decltype(__select_impl<_Sender, 
_Receiver>());
      |                                        ^
./third_party/stdexec/include/stdexec/execution.hpp:1473:30: note: in 
instantiation of template type alias '__select_impl_t' requested here
 1473 |           -> __call_result_t<__select_impl_t<_Sender, _Receiver>> {
      |                              ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:147:10:
 note: while substituting deduced template arguments into function template 
'operator()' [with _Sender = stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
_Receiver = (anonymous namespace)::expect_error_receiver<>]
  147 | decltype(std::declval<_Fp>()(std::declval<_Args>()...))
      |          ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:157:19:
 note: while substituting deduced template arguments into function template 
'__invoke' [with _Fp = stdexec::__connect::connect_t, _Args = 
<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>]
  157 |   static decltype(std::__invoke(std::declval<_XFp>(), 
std::declval<_XArgs>()...)) __try_call(int);
      |                   ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:163:28:
 note: while substituting deduced template arguments into function template 
'__try_call' [with _XFp = stdexec::__connect::connect_t, _XArgs = (no value)]
  163 |   using _Result = decltype(__try_call<_Fp, _Args...>(0));
      |                            ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:211:24:
 note: in instantiation of template class 'std::__invokable_r<void, 
stdexec::__connect::connect_t, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>' requested here
  211 |     : public enable_if<__invokable<_Fp, _Args...>::value, typename 
__invokable_r<void, _Fp, _Args...>::_Result> {};
      |                        ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:262:45:
 note: in instantiation of template class 
'std::__invoke_of<stdexec::__connect::connect_t, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>' requested here
  262 | struct _LIBCPP_TEMPLATE_VIS invoke_result : __invoke_of<_Fn, _Args...> 
{};
      |                                             ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:265:1:
 note: in instantiation of template class 
'std::invoke_result<stdexec::__connect::connect_t, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>' requested here
  265 | using invoke_result_t = typename invoke_result<_Fn, _Args...>::type;
      | ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__functional/invoke.h:26:53:
 note: in instantiation of template type alias 'invoke_result_t' requested here
   26 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 
invoke_result_t<_Fn, _Args...>
      |                                                     ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__concepts/invocable.h:28:3:
 note: while substituting deduced template arguments into function template 
'invoke' [with _Fn = stdexec::__connect::connect_t, _Args = 
<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>]
   28 |   std::invoke(std::forward<_Fn>(__fn), std::forward<_Args>(__args)...); 
// not required to be equality preserving
      |   ^
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__concepts/invocable.h:28:3:
 note: in instantiation of requirement here
   28 |   std::invoke(std::forward<_Fn>(__fn), std::forward<_Args>(__args)...); 
// not required to be equality preserving
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__concepts/invocable.h:27:21:
 note: while substituting template arguments into constraint expression here
   27 | concept invocable = requires(_Fn&& __fn, _Args&&... __args) {
      |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   28 |   std::invoke(std::forward<_Fn>(__fn), std::forward<_Args>(__args)...); 
// not required to be equality preserving
      |   
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   29 | };
      | ~
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:69:20:
 note: while checking the satisfaction of concept 
'invocable<stdexec::__connect::connect_t, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>' requested here
   69 |     static_assert(!std::invocable);
      |                    
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./third_party/stdexec/include/stdexec/execution.hpp:256:10: note: candidate 
template ignored: substitution failure [with _TaggedTuple = 
stdexec::__mtry_catch<stdexec::__select_completions_for<stdexec::__receivers::set_error_t,
 stdexec::__qf<stdexec::__receivers::set_error_t>>, 
stdexec::__mconst<stdexec::__>>, _Variant = stdexec::__remove<stdexec::__, 
stdexec::__q<stdexec::completion_signatures>>, _Sigs = 
<stdexec::__receivers::set_value_t (int), stdexec::__receivers::set_error_t 
(std::exception_ptr)>]: pack expansion used as argument for non-pack parameter 
of alias template
  256 |     auto __for_all_sigs_(completion_signatures<_Sigs...>*, 
_TaggedTuple*, _Variant*)
      |          ^
```

</details>

<details>
<summary>Crash dump</summary>

```
PLEASE submit a bug report to http://go/clang-crash-bug and include the crash 
backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: 
third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang 
-frandom-seed=blaze-out/k8-fastbuild/bin/third_party/stdexec/test/_objs/stdexec_algos_adaptors_test_stopped_as_optional/test_stopped_as_optional.pic.o
 -DCATCH_CONFIG_NO_CPP17_UNCAUGHT_EXCEPTIONS -DSTDEXEC_USE_EXCEPTIONS 
-DABSL_ALLOCATOR_NOTHROW -DINTERNAL_DEPLOYMENT -iquote . -iquote 
blaze-out/k8-fastbuild/genfiles -iquote blaze-out/k8-fastbuild/bin -iquote 
blaze-out/k8-fastbuild-ST-c90edcb1652f/genfiles -iquote 
blaze-out/k8-fastbuild-ST-c90edcb1652f/bin -isystem 
third_party/catch/single_include -isystem 
blaze-out/k8-fastbuild/genfiles/third_party/catch/single_include -isystem 
blaze-out/k8-fastbuild/bin/third_party/catch/single_include -isystem 
third_party/stl/cxx17 -isystem 
blaze-out/k8-fastbuild-ST-c90edcb1652f/genfiles/third_party/stl/cxx17 -isystem 
blaze-out/k8-fastbuild-ST-c90edcb1652f/bin/third_party/stl/cxx17 -isystem 
third_party/stl/itanium_abi -isystem 
blaze-out/k8-fastbuild-ST-c90edcb1652f/genfiles/third_party/stl/itanium_abi 
-isystem blaze-out/k8-fastbuild-ST-c90edcb1652f/bin/third_party/stl/itanium_abi 
-fno-omit-frame-pointer -no-canonical-prefixes -DCOMPILER_GCC3 -DCOMPILER_GCC4 
-DGOOGLE_GLIBCXX_VERSION=40901 -DHASH_NAMESPACE=__gnu_cxx 
-D__STDC_FORMAT_MACROS -DSUPPRESS_USE_FILE_OFFSET64 -fdiagnostics-show-option 
-fmessage-length=0 -fno-exceptions -fbracket-depth=768 -fno-strict-aliasing 
-fmerge-all-constants -flax-vector-conversions=all -funsigned-char 
-ffile-reproducible -fcolor-diagnostics -D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES 
-fno-assume-unique-vtables -Wall -Werror -Wno-address-of-packed-member 
-Wno-defaulted-function-deleted -Wno-enum-compare-switch 
-Wno-expansion-to-defined -Wno-ignored-attributes -Wno-ignored-qualifiers 
-Wno-inconsistent-missing-override -Wno-potentially-evaluated-expression 
-Wno-range-loop-analysis -Wno-strict-prototypes 
-Wno-tautological-type-limit-compare -Wno-tautological-undefined-compare 
-Wno-tautological-unsigned-zero-compare 
-Wno-tautological-unsigned-enum-zero-compare -Wno-undefined-func-template 
-Wno-unused-but-set-variable -Wno-unused-lambda-capture 
-Wno-unused-local-typedef -Wno-deprecated-builtins -Wno-deprecated-volatile 
-Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-compare 
-Wno-deprecated-enum-enum-conversion -Wno-deprecated-enum-compare-conditional 
-Wno-deprecated-enum-float-conversion -Wno-deprecated-this-capture 
-Wno-deprecated-array-compare -Wno-deprecated-comma-subscript 
-Wno-bitfield-constant-conversion -Wno-bitwise-instead-of-logical -Wno-comment 
-Wno-compound-token-split -Wno-deprecated-non-prototype 
-Wno-enum-constexpr-conversion -Wno-misleading-indentation -Wno-psabi 
-Wno-unqualified-std-cast-call -Wno-ambiguous-member-template 
-Wno-char-subscripts -Wno-deprecated-declarations -Wno-deprecated-pragma 
-Wno-extern-c-compat -Wno-gnu-alignof-expression 
-Wno-gnu-variable-sized-type-not-at-end -Wno-implicit-int-float-conversion 
-Wno-invalid-source-encoding -Wno-mismatched-tags -Wno-pointer-sign 
-Wno-private-header -Wno-sign-compare -Wno-strict-overflow -Wno-unknown-pragmas 
-Wno-unused-command-line-argument -Wno-unused-const-variable 
-Wno-unused-function -Wno-unused-private-field -Wno-user-defined-warnings 
-Wfloat-overflow-conversion -Wfloat-zero-conversion -Wfor-loop-analysis 
-Wgnu-redeclared-enum -Winfinite-recursion -Wself-assign -Wstring-conversion 
-Wtautological-overlap-compare -Wunused-but-set-parameter -Wunused-comparison 
-Wvla -Wno-return-type-c-linkage -Wno-self-assign-overloaded 
-Wctad-maybe-unsupported -Wgoogle3-inline-namespace -Wgoogle3-literal-operator 
-Wthread-safety-beta --cuda-host-only -faligned-allocation -fnew-alignment=8 
-Wno-trigraphs -Woverloaded-virtual -Wno-invalid-offsetof 
-Wno-final-dtor-non-final-class -Wnon-virtual-dtor -Wimplicit-fallthrough 
-fshow-overloads=best -Wno-c++23-lambda-attributes -fcoro-aligned-allocation 
-O1 -fno-asynchronous-unwind-tables -ffp-contract=off 
--target=x86_64-grtev4-linux-gnu -DOS_LINUX -fno-unique-section-names -maes 
-mcx16 -msse4.2 -mpclmul -mprefer-vector-width=128 -mprfchw 
-fsplit-dwarf-inlining -gz=zstd --system-header-prefix=third_party/ 
--no-system-header-prefix=third_party/absl/ 
--no-system-header-prefix=third_party/blue/ 
--no-system-header-prefix=third_party/car/ 
--no-system-header-prefix=third_party/crubit/ 
--no-system-header-prefix=third_party/diff/ 
--no-system-header-prefix=third_party/eigen3/ 
--no-system-header-prefix=third_party/giza/ 
--no-system-header-prefix=third_party/gnupg/ 
--no-system-header-prefix=third_party/gnupg2/ 
--no-system-header-prefix=third_party/gpus/nccl_plugins/ 
--no-system-header-prefix=third_party/golang/ 
--no-system-header-prefix=third_party/google_home_platform/ 
--no-system-header-prefix=third_party/googlefuzztest/ 
--no-system-header-prefix=third_party/googletest/ 
--no-system-header-prefix=third_party/halide/ 
--no-system-header-prefix=third_party/icu/ 
--no-system-header-prefix=third_party/iree/ 
--no-system-header-prefix=third_party/libaddressinput/ 
--no-system-header-prefix=third_party/libwebp/ 
--no-system-header-prefix=third_party/llvm/ 
--no-system-header-prefix=third_party/mlir_edge/ 
--no-system-header-prefix=third_party/nik/ 
--no-system-header-prefix=third_party/nss/ 
--no-system-header-prefix=third_party/openssl/ 
--no-system-header-prefix=third_party/program_image_remapper/ 
--no-system-header-prefix=third_party/protobuf/ 
--no-system-header-prefix=third_party/py/riegeli/ 
--no-system-header-prefix=third_party/riegeli/ 
--no-system-header-prefix=third_party/safari/ 
--no-system-header-prefix=third_party/sketchology/ 
--no-system-header-prefix=third_party/stg/ 
--no-system-header-prefix=third_party/tcmalloc/ 
--no-system-header-prefix=third_party/tensorflow/ 
--no-system-header-prefix=third_party/tensorflow_text/ 
--no-system-header-prefix=third_party/tink/ 
--no-system-header-prefix=third_party/windmill/ -Wthread-safety-analysis 
-D__GOOGLE3_RANDOMIZATION_ROLLOUT=6 
-D_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY 
-D_LIBCPP_DEBUG_STRICT_WEAK_ORDERING_CHECK 
-D_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 
-D_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 
-D_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 
-D_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 
-D_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 
-D_LIBCPP_ENABLE_CXX20_REMOVED_SHARED_PTR_UNIQUE 
-D_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 
-D_LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 
-D_LIBCPP_GOOGLE3_EARLY_DELETED_STRING_VIEW_NULLPTR_CTOR 
-fsanitize=alignment,return,returns-nonnull-attribute,vla-bound,unreachable,float-cast-overflow
 -fsanitize-trap=all -DUNDEFINED_BEHAVIOR_SANITIZER -fsanitize=null 
-fmodule-name=//third_party/stdexec/test:stdexec_algos_adaptors_test_stopped_as_optional
 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/third_party/stdexec/test/stdexec_algos_adaptors_test_stopped_as_optional.cppmap
 -Xclang=-fno-cxx-modules -Xclang=-fmodule-map-file-home-is-cwd 
-fsized-deallocation -fno-direct-access-external-data -fPIE -fPIC 
-fmodules-strict-decluse -Wprivate-header 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/third_party/crosstool/v18/llvm_unstable/gen-crosstool-x86.cppmap
 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/third_party/stdexec/test/test_common.cppmap
 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/third_party/catch/catch_single_include.cppmap
 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/third_party/stdexec/stdexec.cppmap 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/third_party/stdexec/exec.cppmap 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/third_party/stdexec/stdexec_detail.cppmap
 -fmodule-map-file=blaze-out/k8-fastbuild/bin/tools/cpp/link_extra_lib.cppmap 
-fmodule-map-file=blaze-out/k8-fastbuild/bin/tools/cpp/malloc.cppmap 
-fmodule-map-file=blaze-out/k8-fastbuild-ST-c90edcb1652f/bin/third_party/crosstool/v18/llvm_unstable/stl_cc_library.cppmap
 
-fmodule-map-file=blaze-out/k8-fastbuild-ST-c90edcb1652f/bin/third_party/crosstool/v18/llvm_unstable/src/libc/llvmlibc_cc_library.cppmap
 -fmodule-map-file=third_party/grte/grte-v5-x86.cppmap -ffunction-sections 
-fdata-sections -pthread -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG 
-fexceptions -fcoroutines -ftemplate-backtrace-limit=0 -ferror-limit=0 
-fmacro-backtrace-limit=0 -Wno-ctad-maybe-unsupported 
--sysroot=third_party/grte/v5_x86/release/usr/grte/v5 -std=gnu++20 
-stdlib=libc++ -Wno-tautological-type-limit-compare 
-Wno-thread-safety-reference-return -Wno-nan-infinity-disabled 
-Wno-alias-template-in-declaration-name -Wno-nullability-completeness 
-Wno-builtin-macro-redefined -D__DATE__=\"redacted\" 
-D__TIMESTAMP__=\"redacted\" -D__TIME__=\"redacted\" -c 
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp -o 
blaze-out/k8-fastbuild/bin/third_party/stdexec/test/_objs/stdexec_algos_adaptors_test_stopped_as_optional/test_stopped_as_optional.pic.o
1.      
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:69:89:
 current parser token ')'
2.      
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:26:1:
 parsing namespace '(anonymous)'
3.      
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:63:40:
 parsing function body '(anonymous namespace)::C_A_T_C_H_T_E_S_T_10'
4.      
third_party/stdexec/test/stdexec/algos/adaptors/test_stopped_as_optional.cpp:63:40:
 in compound statement ('{}')
5.      
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:262:29:
 instantiating class definition 
'std::invoke_result<stdexec::__connect::connect_t, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>'
6.      
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:210:8:
 instantiating class definition 
'std::__invoke_of<stdexec::__connect::connect_t, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>'
7.      
third_party/crosstool/v18/llvm_unstable/toolchain/bin/../include/c++/v1/__type_traits/invoke.h:155:8:
 instantiating class definition 'std::__invokable_r<void, 
stdexec::__connect::connect_t, stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>'
8.      ./third_party/stdexec/include/stdexec/execution.hpp:1439:29: 
instantiating function definition 
'stdexec::__connect::connect_t::__select_impl<stdexec::__sexpr<(lambda at 
./third_party/stdexec/include/stdexec/__detail/__basic_sender.hpp:594:18)>, 
(anonymous namespace)::expect_error_receiver<>>'
  #0 0x0000563cd26a92f8 llvm::sys::RunSignalHandlers() 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x80a92f8)
  #1 0x0000563cd2670d16 CrashRecoverySignalHandler(int) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x8070d16)
  #2 0x00007f5b789e1e80 __restore_rt 
(/usr/grte/v5/lib64/libpthread.so.0+0x14e80)
  #3 0x0000563ccf94406d clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous 
namespace)::IntExprEvaluator, bool>::Visit(clang::Stmt const*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x534406d)
  #4 0x0000563ccf8e802c Evaluate(clang::APValue&, (anonymous 
namespace)::EvalInfo&, clang::Expr const*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x52e802c)
  #5 0x0000563ccf8e3d86 EvaluateInPlace(clang::APValue&, (anonymous 
namespace)::EvalInfo&, (anonymous namespace)::LValue const&, clang::Expr 
const*, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x52e3d86)
  #6 0x0000563ccf8e36e5 
clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&, clang::ASTContext 
const&, clang::Expr::ConstantExprKind) const 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x52e36e5)
  #7 0x0000563cceb70feb clang::ActionResult<clang::Expr*, true> 
calculateConstraintSatisfaction<calculateConstraintSatisfaction(clang::Sema&, 
clang::NamedDecl const*, clang::SourceLocation, 
clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, 
clang::ConstraintSatisfaction&)::$_0>(clang::Sema&, clang::Expr const*, 
clang::ConstraintSatisfaction&, calculateConstraintSatisfaction(clang::Sema&, 
clang::NamedDecl const*, clang::SourceLocation, 
clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, 
clang::ConstraintSatisfaction&)::$_0&&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4570feb)
  #8 0x0000563cceb6a94e CheckConstraintSatisfaction(clang::Sema&, 
clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, 
llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList 
const&, clang::SourceRange, clang::ConstraintSatisfaction&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x456a94e)
  #9 0x0000563cceb6a6f6 
clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, 
llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, 
clang::ConstraintSatisfaction&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x456a6f6)
 #10 0x0000563ccf320c39 clang::Sema::CheckConceptTemplateId(clang::CXXScopeSpec 
const&, clang::SourceLocation, clang::DeclarationNameInfo const&, 
clang::NamedDecl*, clang::ConceptDecl*, clang::TemplateArgumentListInfo const*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4d20c39)
 #11 0x0000563ccf471e56 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformConceptSpecializationExpr(clang::ConceptSpecializationExpr*)
 (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e71e56)
 #12 0x0000563ccf492616 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformCondition(clang::SourceLocation, 
clang::VarDecl*, clang::Expr*, clang::Sema::ConditionKind) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e92616)
 #13 0x0000563ccf49053c clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformIfStmt(clang::IfStmt*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e9053c)
 #14 0x0000563ccf478e42 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e78e42)
 #15 0x0000563ccf465c02 clang::Sema::SubstStmt(clang::Stmt*, 
clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e65c02)
 #16 0x0000563ccf4b1c5b 
clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, 
clang::FunctionDecl*, bool, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4eb1c5b)
 #17 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #18 0x0000563ccf3ffb5c clang::Sema::DeduceReturnType(clang::FunctionDecl*, 
clang::SourceLocation, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dffb5c)
 #19 0x0000563ccee979b4 clang::Sema::DiagnoseUseOfDecl(clang::NamedDecl*, 
llvm::ArrayRef<clang::SourceLocation>, clang::ObjCInterfaceDecl const*, bool, 
bool, clang::ObjCInterfaceDecl*, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48979b4)
 #20 0x0000563ccf27bbd3 FinishOverloadedCallExpr(clang::Sema&, clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, 
clang::OverloadCandidateSet*, clang::OverloadCandidate**, 
clang::OverloadingResult, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7bbd3)
 #21 0x0000563ccf27baa4 clang::Sema::BuildOverloadedCallExpr(clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7baa4)
 #22 0x0000563ccee9fd58 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x489fd58)
 #23 0x0000563cceec2b9b clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48c2b9b)
 #24 0x0000563ccf4725bb clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e725bb)
 #25 0x0000563ccf48481b clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformDecltypeType(clang::TypeLocBuilder&,
 clang::DecltypeTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8481b)
 #26 0x0000563ccf45ee32 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5ee32)
 #27 0x0000563ccf45f840 clang::Sema::SubstType(clang::QualType, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, 
clang::DeclarationName) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5f840)
 #28 0x0000563ccf310188 clang::Sema::CheckTemplateIdType(clang::TemplateName, 
clang::SourceLocation, clang::TemplateArgumentListInfo&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4d10188)
 #29 0x0000563ccf481988 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc, clang::TemplateName) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e81988)
 #30 0x0000563ccf48952a clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8952a)
 #31 0x0000563ccf486469 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformElaboratedType(clang::TypeLocBuilder&,
 clang::ElaboratedTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e86469)
 #32 0x0000563ccf45ee32 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5ee32)
 #33 0x0000563ccf466390 (anonymous 
namespace)::TemplateInstantiator::TransformTemplateArgument(clang::TemplateArgumentLoc
 const&, clang::TemplateArgumentLoc&, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e66390)
 #34 0x0000563ccf481274 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc, clang::TemplateName) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e81274)
 #35 0x0000563ccf48952a clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8952a)
 #36 0x0000563ccf486469 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformElaboratedType(clang::TypeLocBuilder&,
 clang::ElaboratedTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e86469)
 #37 0x0000563ccf45ff2c 
clang::Sema::SubstFunctionDeclType(clang::TypeSourceInfo*, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, 
clang::DeclarationName, clang::CXXRecordDecl*, clang::Qualifiers, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5ff2c)
 #38 0x0000563ccf4a9537 
clang::TemplateDeclInstantiator::SubstFunctionType(clang::FunctionDecl*, 
llvm::SmallVectorImpl<clang::ParmVarDecl*>&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea9537)
 #39 0x0000563ccf4a6541 
clang::TemplateDeclInstantiator::VisitCXXMethodDecl(clang::CXXMethodDecl*, 
clang::TemplateParameterList*, clang::TemplateDeclInstantiator::RewriteKind) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea6541)
 #40 0x0000563ccf4df1f9 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, 
clang::MultiLevelTemplateArgumentList const&)::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4edf1f9)
 #41 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #42 0x0000563ccf4afd92 clang::Sema::SubstDecl(clang::Decl*, 
clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4eafd92)
 #43 0x0000563ccf3fa834 
clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, 
llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, 
llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, 
llvm::function_ref<bool ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfa834)
 #44 0x0000563ccf456f96 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*,
 clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>)::$_2>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e56f96)
 #45 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #46 0x0000563ccf3fc253 
clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, 
clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfc253)
 #47 0x0000563ccf265009 
clang::Sema::AddMethodTemplateCandidate(clang::FunctionTemplateDecl*, 
clang::DeclAccessPair, clang::CXXRecordDecl*, clang::TemplateArgumentListInfo*, 
clang::QualType, clang::Expr::Classification, llvm::ArrayRef<clang::Expr*>, 
clang::OverloadCandidateSet&, bool, bool, clang::OverloadCandidateParamOrder) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c65009)
 #48 0x0000563ccf2852e0 
clang::Sema::BuildCallToObjectOfClassType(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c852e0)
 #49 0x0000563cceea0286 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48a0286)
 #50 0x0000563cceec2b9b clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48c2b9b)
 #51 0x0000563ccf4725bb clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e725bb)
 #52 0x0000563ccf48481b clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformDecltypeType(clang::TypeLocBuilder&,
 clang::DecltypeTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8481b)
 #53 0x0000563ccf45fcec 
clang::Sema::SubstFunctionDeclType(clang::TypeSourceInfo*, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, 
clang::DeclarationName, clang::CXXRecordDecl*, clang::Qualifiers, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5fcec)
 #54 0x0000563ccf4a9537 
clang::TemplateDeclInstantiator::SubstFunctionType(clang::FunctionDecl*, 
llvm::SmallVectorImpl<clang::ParmVarDecl*>&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea9537)
 #55 0x0000563ccf4a7b48 
clang::TemplateDeclInstantiator::VisitFunctionDecl(clang::FunctionDecl*, 
clang::TemplateParameterList*, clang::TemplateDeclInstantiator::RewriteKind) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea7b48)
 #56 0x0000563ccf4df1f9 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, 
clang::MultiLevelTemplateArgumentList const&)::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4edf1f9)
 #57 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #58 0x0000563ccf4afd92 clang::Sema::SubstDecl(clang::Decl*, 
clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4eafd92)
 #59 0x0000563ccf3fa834 
clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, 
llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, 
llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, 
llvm::function_ref<bool ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfa834)
 #60 0x0000563ccf456f96 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*,
 clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>)::$_2>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e56f96)
 #61 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #62 0x0000563ccf3fc253 
clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, 
clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfc253)
 #63 0x0000563ccf26558e 
clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, 
clang::DeclAccessPair, clang::TemplateArgumentListInfo*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, 
clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c6558e)
 #64 0x0000563ccf27b45d AddOverloadedCallCandidate(clang::Sema&, 
clang::DeclAccessPair, clang::TemplateArgumentListInfo*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b45d)
 #65 0x0000563ccf27b36b 
clang::Sema::AddOverloadedCallCandidates(clang::UnresolvedLookupExpr*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b36b)
 #66 0x0000563ccf27b62c clang::Sema::buildOverloadedCallSet(clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, 
clang::OverloadCandidateSet*, clang::ActionResult<clang::Expr*, true>*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b62c)
 #67 0x0000563ccf27b8ed clang::Sema::BuildOverloadedCallExpr(clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b8ed)
 #68 0x0000563ccee9fd58 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x489fd58)
 #69 0x0000563cceec2b9b clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48c2b9b)
 #70 0x0000563ccf4725bb clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e725bb)
 #71 0x0000563ccf48481b clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformDecltypeType(clang::TypeLocBuilder&,
 clang::DecltypeTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8481b)
 #72 0x0000563ccf45fcec 
clang::Sema::SubstFunctionDeclType(clang::TypeSourceInfo*, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, 
clang::DeclarationName, clang::CXXRecordDecl*, clang::Qualifiers, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5fcec)
 #73 0x0000563ccf4a9537 
clang::TemplateDeclInstantiator::SubstFunctionType(clang::FunctionDecl*, 
llvm::SmallVectorImpl<clang::ParmVarDecl*>&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea9537)
 #74 0x0000563ccf4a6541 
clang::TemplateDeclInstantiator::VisitCXXMethodDecl(clang::CXXMethodDecl*, 
clang::TemplateParameterList*, clang::TemplateDeclInstantiator::RewriteKind) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea6541)
 #75 0x0000563ccf4df1f9 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, 
clang::MultiLevelTemplateArgumentList const&)::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4edf1f9)
 #76 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #77 0x0000563ccf4afd92 clang::Sema::SubstDecl(clang::Decl*, 
clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4eafd92)
 #78 0x0000563ccf3fa834 
clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, 
llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, 
llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, 
llvm::function_ref<bool ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfa834)
 #79 0x0000563ccf456f96 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*,
 clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>)::$_2>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e56f96)
 #80 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #81 0x0000563ccf3fc253 
clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, 
clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfc253)
 #82 0x0000563ccf26558e 
clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, 
clang::DeclAccessPair, clang::TemplateArgumentListInfo*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, 
clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c6558e)
 #83 0x0000563ccf27b45d AddOverloadedCallCandidate(clang::Sema&, 
clang::DeclAccessPair, clang::TemplateArgumentListInfo*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b45d)
 #84 0x0000563ccf27b36b 
clang::Sema::AddOverloadedCallCandidates(clang::UnresolvedLookupExpr*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b36b)
 #85 0x0000563ccf27b62c clang::Sema::buildOverloadedCallSet(clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, 
clang::OverloadCandidateSet*, clang::ActionResult<clang::Expr*, true>*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b62c)
 #86 0x0000563ccf27b8ed clang::Sema::BuildOverloadedCallExpr(clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b8ed)
 #87 0x0000563ccee9fd58 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x489fd58)
 #88 0x0000563cceec2b9b clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48c2b9b)
 #89 0x0000563ccf4725bb clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e725bb)
 #90 0x0000563ccf48481b clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformDecltypeType(clang::TypeLocBuilder&,
 clang::DecltypeTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8481b)
 #91 0x0000563ccf45ee32 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5ee32)
 #92 0x0000563ccf45eb55 clang::Sema::SubstType(clang::TypeSourceInfo*, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, 
clang::DeclarationName, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5eb55)
 #93 0x0000563ccf49eb7d 
clang::TemplateDeclInstantiator::InstantiateTypedefNameDecl(clang::TypedefNameDecl*,
 bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e9eb7d)
 #94 0x0000563ccf49fbf3 
clang::TemplateDeclInstantiator::VisitTypeAliasDecl(clang::TypeAliasDecl*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e9fbf3)
 #95 0x0000563ccf462c7d clang::Sema::InstantiateClass(clang::SourceLocation, 
clang::CXXRecordDecl*, clang::CXXRecordDecl*, 
clang::MultiLevelTemplateArgumentList const&, 
clang::TemplateSpecializationKind, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e62c7d)
 #96 0x0000563ccf464f9b 
clang::Sema::InstantiateClassTemplateSpecialization(clang::SourceLocation, 
clang::ClassTemplateSpecializationDecl*, clang::TemplateSpecializationKind, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e64f9b)
 #97 0x0000563ccf549cf3 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, 
clang::QualType, clang::Sema::CompleteTypeKind, 
clang::Sema::TypeDiagnoser*)::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f49cf3)
 #98 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
 #99 0x0000563ccf52bae4 
clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, clang::QualType, 
clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f2bae4)
#100 0x0000563ccf52b3b5 clang::Sema::RequireCompleteType(clang::SourceLocation, 
clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f2b3b5)
#101 0x0000563ccea4d3e6 
clang::Sema::RequireCompleteDeclContext(clang::CXXScopeSpec&, 
clang::DeclContext*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x444d3e6)
#102 0x0000563cceeae23a 
clang::Sema::BuildQualifiedDeclarationNameExpr(clang::CXXScopeSpec&, 
clang::DeclarationNameInfo const&, bool, clang::Scope const*, 
clang::TypeSourceInfo**) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48ae23a)
#103 0x0000563ccf477425 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformDependentScopeDeclRefExpr(clang::DependentScopeDeclRefExpr*,
 bool, clang::TypeSourceInfo**) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e77425)
#104 0x0000563ccf46640d (anonymous 
namespace)::TemplateInstantiator::TransformTemplateArgument(clang::TemplateArgumentLoc
 const&, clang::TemplateArgumentLoc&, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e6640d)
#105 0x0000563ccf481274 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc, clang::TemplateName) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e81274)
#106 0x0000563ccf48952a clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8952a)
#107 0x0000563ccf486469 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformElaboratedType(clang::TypeLocBuilder&,
 clang::ElaboratedTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e86469)
#108 0x0000563ccf45ee32 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5ee32)
#109 0x0000563ccf4623cb clang::Sema::SubstBaseSpecifiers(clang::CXXRecordDecl*, 
clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e623cb)
#110 0x0000563ccf462b08 clang::Sema::InstantiateClass(clang::SourceLocation, 
clang::CXXRecordDecl*, clang::CXXRecordDecl*, 
clang::MultiLevelTemplateArgumentList const&, 
clang::TemplateSpecializationKind, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e62b08)
#111 0x0000563ccf464f9b 
clang::Sema::InstantiateClassTemplateSpecialization(clang::SourceLocation, 
clang::ClassTemplateSpecializationDecl*, clang::TemplateSpecializationKind, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e64f9b)
#112 0x0000563ccf549cf3 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, 
clang::QualType, clang::Sema::CompleteTypeKind, 
clang::Sema::TypeDiagnoser*)::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f49cf3)
#113 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
#114 0x0000563ccf52bae4 
clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, clang::QualType, 
clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f2bae4)
#115 0x0000563ccf52b3b5 clang::Sema::RequireCompleteType(clang::SourceLocation, 
clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f2b3b5)
#116 0x0000563cced86119 clang::Sema::CheckBaseSpecifier(clang::CXXRecordDecl*, 
clang::SourceRange, bool, clang::AccessSpecifier, clang::TypeSourceInfo*, 
clang::SourceLocation) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4786119)
#117 0x0000563ccf462673 clang::Sema::SubstBaseSpecifiers(clang::CXXRecordDecl*, 
clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e62673)
#118 0x0000563ccf462b08 clang::Sema::InstantiateClass(clang::SourceLocation, 
clang::CXXRecordDecl*, clang::CXXRecordDecl*, 
clang::MultiLevelTemplateArgumentList const&, 
clang::TemplateSpecializationKind, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e62b08)
#119 0x0000563ccf464f9b 
clang::Sema::InstantiateClassTemplateSpecialization(clang::SourceLocation, 
clang::ClassTemplateSpecializationDecl*, clang::TemplateSpecializationKind, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e64f9b)
#120 0x0000563ccf549cf3 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, 
clang::QualType, clang::Sema::CompleteTypeKind, 
clang::Sema::TypeDiagnoser*)::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f49cf3)
#121 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
#122 0x0000563ccf52bae4 
clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, clang::QualType, 
clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f2bae4)
#123 0x0000563ccf52b3b5 clang::Sema::RequireCompleteType(clang::SourceLocation, 
clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4f2b3b5)
#124 0x0000563ccea4d3e6 
clang::Sema::RequireCompleteDeclContext(clang::CXXScopeSpec&, 
clang::DeclContext*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x444d3e6)
#125 0x0000563ccf33af4d 
clang::Sema::CheckTypenameType(clang::ElaboratedTypeKeyword, 
clang::SourceLocation, clang::NestedNameSpecifierLoc, clang::IdentifierInfo 
const&, clang::SourceLocation, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4d3af4d)
#126 0x0000563ccf48269a clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformDependentNameType(clang::TypeLocBuilder&,
 clang::DependentNameTypeLoc, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8269a)
#127 0x0000563ccf45ee32 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5ee32)
#128 0x0000563ccf45f840 clang::Sema::SubstType(clang::QualType, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, 
clang::DeclarationName) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5f840)
#129 0x0000563ccf310188 clang::Sema::CheckTemplateIdType(clang::TemplateName, 
clang::SourceLocation, clang::TemplateArgumentListInfo&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4d10188)
#130 0x0000563ccf481988 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc, clang::TemplateName) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e81988)
#131 0x0000563ccf48952a clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&,
 clang::TemplateSpecializationTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e8952a)
#132 0x0000563ccf486469 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformElaboratedType(clang::TypeLocBuilder&,
 clang::ElaboratedTypeLoc) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e86469)
#133 0x0000563ccf45fcec 
clang::Sema::SubstFunctionDeclType(clang::TypeSourceInfo*, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, 
clang::DeclarationName, clang::CXXRecordDecl*, clang::Qualifiers, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e5fcec)
#134 0x0000563ccf4a9537 
clang::TemplateDeclInstantiator::SubstFunctionType(clang::FunctionDecl*, 
llvm::SmallVectorImpl<clang::ParmVarDecl*>&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea9537)
#135 0x0000563ccf4a7b48 
clang::TemplateDeclInstantiator::VisitFunctionDecl(clang::FunctionDecl*, 
clang::TemplateParameterList*, clang::TemplateDeclInstantiator::RewriteKind) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4ea7b48)
#136 0x0000563ccf4df1f9 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, 
clang::MultiLevelTemplateArgumentList const&)::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4edf1f9)
#137 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
#138 0x0000563ccf4afd92 clang::Sema::SubstDecl(clang::Decl*, 
clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4eafd92)
#139 0x0000563ccf3fa834 
clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, 
llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, 
llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, 
llvm::function_ref<bool ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfa834)
#140 0x0000563ccf456f96 void llvm::function_ref<void 
()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*,
 clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>)::$_2>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e56f96)
#141 0x0000563cce9aa46f 
clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, 
llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x43aa46f)
#142 0x0000563ccf3fc253 
clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, 
clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, 
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, 
clang::QualType, clang::Expr::Classification, llvm::function_ref<bool 
(llvm::ArrayRef<clang::QualType>)>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4dfc253)
#143 0x0000563ccf26558e 
clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, 
clang::DeclAccessPair, clang::TemplateArgumentListInfo*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, 
clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c6558e)
#144 0x0000563ccf27b45d AddOverloadedCallCandidate(clang::Sema&, 
clang::DeclAccessPair, clang::TemplateArgumentListInfo*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b45d)
#145 0x0000563ccf27b36b 
clang::Sema::AddOverloadedCallCandidates(clang::UnresolvedLookupExpr*, 
llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b36b)
#146 0x0000563ccf27b62c clang::Sema::buildOverloadedCallSet(clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, 
clang::OverloadCandidateSet*, clang::ActionResult<clang::Expr*, true>*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b62c)
#147 0x0000563ccf27b8ed clang::Sema::BuildOverloadedCallExpr(clang::Scope*, 
clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, 
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, 
bool) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4c7b8ed)
#148 0x0000563ccee9fd58 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x489fd58)
#149 0x0000563cceec2b9b clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x48c2b9b)
#150 0x0000563ccf4725bb clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e725bb)
#151 0x0000563ccf47a7d6 clang::TreeTransform<(anonymous 
namespace)::TemplateInstantiator>::TransformRequiresExpr(clang::RequiresExpr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e7a7d6)
#152 0x0000563ccf46ccbd (anonymous 
namespace)::TemplateInstantiator::TransformRequiresExpr(clang::RequiresExpr*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e6ccbd)
#153 0x0000563ccf467780 clang::Sema::SubstConstraintExpr(clang::Expr*, 
clang::MultiLevelTemplateArgumentList const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4e67780)
#154 0x0000563cceb72289 calculateConstraintSatisfaction(clang::Sema&, 
clang::NamedDecl const*, clang::SourceLocation, 
clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, 
clang::ConstraintSatisfaction&)::$_0::operator()(clang::Expr const*) const 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4572289)
#155 0x0000563cceb70f52 clang::ActionResult<clang::Expr*, true> 
calculateConstraintSatisfaction<calculateConstraintSatisfaction(clang::Sema&, 
clang::NamedDecl const*, clang::SourceLocation, 
clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, 
clang::ConstraintSatisfaction&)::$_0>(clang::Sema&, clang::Expr const*, 
clang::ConstraintSatisfaction&, calculateConstraintSatisfaction(clang::Sema&, 
clang::NamedDecl const*, clang::SourceLocation, 
clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, 
clang::ConstraintSatisfaction&)::$_0&&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4570f52)
#156 0x0000563cceb6a94e CheckConstraintSatisfaction(clang::Sema&, 
clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, 
llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList 
const&, clang::SourceRange, clang::ConstraintSatisfaction&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x456a94e)
#157 0x0000563cceb6a6f6 
clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, 
llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, 
clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, 
clang::ConstraintSatisfaction&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x456a6f6)
#158 0x0000563ccf320c39 clang::Sema::CheckConceptTemplateId(clang::CXXScopeSpec 
const&, clang::SourceLocation, clang::DeclarationNameInfo const&, 
clang::NamedDecl*, clang::ConceptDecl*, clang::TemplateArgumentListInfo const*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4d20c39)
#159 0x0000563ccf321127 clang::Sema::BuildTemplateIdExpr(clang::CXXScopeSpec 
const&, clang::SourceLocation, clang::LookupResult&, bool, 
clang::TemplateArgumentListInfo const*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4d21127)
#160 0x0000563ccee9f8e9 clang::Sema::ActOnIdExpression(clang::Scope*, 
clang::CXXScopeSpec&, clang::SourceLocation, clang::UnqualifiedId&, bool, bool, 
clang::CorrectionCandidateCallback*, bool, clang::Token*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x489f8e9)
#161 0x0000563cce631216 
clang::Parser::tryParseCXXIdExpression(clang::CXXScopeSpec&, bool, 
clang::Token&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4031216)
#162 0x0000563cce632936 clang::Parser::ParseCXXIdExpression(bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4032936)
#163 0x0000563cce622928 
clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, 
clang::Parser::TypeCastState, bool, bool*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4022928)
#164 0x0000563cce623584 
clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, 
clang::Parser::TypeCastState, bool, bool*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4023584)
#165 0x0000563cce61e0e4 
clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, 
clang::Parser::TypeCastState, bool, bool*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x401e0e4)
#166 0x0000563cce620b71 
clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, 
clang::Parser::TypeCastState, bool, bool*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4020b71)
#167 0x0000563cce61e0e4 
clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, 
clang::Parser::TypeCastState, bool, bool*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x401e0e4)
#168 0x0000563cce6201fa 
clang::Parser::ParseConstantExpressionInExprEvalContext(clang::Parser::TypeCastState)
 (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x40201fa)
#169 0x0000563cce64d3c6 
clang::Parser::ParseStaticAssertDeclaration(clang::SourceLocation&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x404d3c6)
#170 0x0000563cce67591c 
clang::Parser::ParseDeclaration(clang::DeclaratorContext, 
clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, 
clang::SourceLocation*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x407591c)
#171 0x0000563cce6ad236 
clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*,
 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, 
clang::ParsedAttributes&, clang::ParsedAttributes&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x40ad236)
#172 0x0000563cce6ac634 
clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 
32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x40ac634)
#173 0x0000563cce6b7650 clang::Parser::ParseCompoundStatementBody(bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x40b7650)
#174 0x0000563cce6b85c6 clang::Parser::ParseFunctionStatementBody(clang::Decl*, 
clang::Parser::ParseScope&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x40b85c6)
#175 0x0000563cce5fe267 
clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, 
clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ffe267)
#176 0x0000563cce6785e5 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, 
clang::DeclaratorContext, clang::ParsedAttributes&, 
clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, 
clang::Parser::ForRangeInit*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x40785e5)
#177 0x0000563cce5fce72 
clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, 
clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ffce72)
#178 0x0000563cce5fc88e 
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, 
clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ffc88e)
#179 0x0000563cce5fb99d 
clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, 
clang::ParsedAttributes&, clang::ParsingDeclSpec*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ffb99d)
#180 0x0000563cce648cd6 
clang::Parser::ParseInnerNamespace(llvm::SmallVector<clang::Parser::InnerNamespaceInfo,
 4u> const&, unsigned int, clang::SourceLocation&, clang::ParsedAttributes&, 
clang::BalancedDelimiterTracker&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4048cd6)
#181 0x0000563cce64816e clang::Parser::ParseNamespace(clang::DeclaratorContext, 
clang::SourceLocation&, clang::SourceLocation) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x404816e)
#182 0x0000563cce675c0f 
clang::Parser::ParseDeclaration(clang::DeclaratorContext, 
clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, 
clang::SourceLocation*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x4075c0f)
#183 0x0000563cce5fb254 
clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, 
clang::ParsedAttributes&, clang::ParsingDeclSpec*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ffb254)
#184 0x0000563cce5f9aa7 
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, 
clang::Sema::ModuleImportState&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ff9aa7)
#185 0x0000563cce5f49fe clang::ParseAST(clang::Sema&, bool, bool) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ff49fe)
#186 0x0000563cce36bd3a clang::FrontendAction::Execute() 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3d6bd3a)
#187 0x0000563cce2e56e4 
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3ce56e4)
#188 0x0000563ccd49b6cf 
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x2e9b6cf)
#189 0x0000563ccd490bec cc1_main(llvm::ArrayRef<char const*>, char const*, 
void*) (third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x2e90bec)
#190 0x0000563ccd48dc26 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, 
llvm::ToolContext const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x2e8dc26)
#191 0x0000563cce46b99e void llvm::function_ref<void 
()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__u::optional<llvm::StringRef>>,
 std::__u::basic_string<char, std::__u::char_traits<char>, 
std::__u::allocator<char>>*, bool*) const::$_0>(long) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3e6b99e)
#192 0x0000563cd2670aef 
llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x8070aef)
#193 0x0000563cce46b17a 
clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__u::optional<llvm::StringRef>>,
 std::__u::basic_string<char, std::__u::char_traits<char>, 
std::__u::allocator<char>>*, bool*) const 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3e6b17a)
#194 0x0000563cce42d77d 
clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, 
clang::driver::Command const*&, bool) const 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3e2d77d)
#195 0x0000563cce42da2f 
clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, 
llvm::SmallVectorImpl<std::__u::pair<int, clang::driver::Command const*>>&, 
bool) const 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3e2da2f)
#196 0x0000563cce44aed0 
clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, 
llvm::SmallVectorImpl<std::__u::pair<int, clang::driver::Command const*>>&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x3e4aed0)
#197 0x0000563ccd48d224 clang_main(int, char**, llvm::ToolContext const&) 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x2e8d224)
#198 0x0000563ccd48b6f4 main 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x2e8b6f4)
#199 0x00007f5b788723d4 __libc_start_main (/usr/grte/v5/lib64/libc.so.6+0x613d4)
#200 0x0000563ccd48b62a _start 
(third_party/crosstool/v18/llvm_unstable/toolchain/bin/clang+0x2e8b62a)
clang: error: clang frontend command failed with exit code 139 (use -v to see 
invocation)
clang version google3-trunk (1d87465a0a95cee9accc5dce7abdabbbc3f3c122)
Target: x86_64-grtev4-linux-gnu
Thread model: posix
InstalledDir: third_party/crosstool/v18/llvm_unstable/toolchain/bin
clang: note: diagnostic msg: 
```

</details>



https://github.com/llvm/llvm-project/pull/89807
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