https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110809
Bug ID: 110809
Summary: ICE: in unify, at cp/pt.cc:25226 with floating-point
NTTPs
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ed at catmur dot uk
Target Milestone: ---
#include <boost/hana.hpp>
using A = double;
template<A> struct S {};
auto x = boost::hana::make_map(
boost::hana::make_pair(boost::hana::type_c<S<A(1)>>, 1),
boost::hana::make_pair(boost::hana::type_c<S<A(2)>>, 2))[
boost::hana::type_c<S<A(1)>>];
/opt/compiler-explorer/libs/boost_1_82_0/boost/hana/detail/hash_table.hpp:51:62:
internal compiler error: in unify, at cp/pt.cc:25226
51 | using type =
decltype(detail::find_indices_impl<Hash>(std::declval<Map>()));
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
0x246af2e internal_error(char const*, ...)
???:0
0xac8ab6 fancy_abort(char const*, int, char const*)
???:0
0xd01e11 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
???:0
0xaf7db9 build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
???:0
0xd2379c finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0xcddfef tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xcde6fc tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd06d50 instantiate_class_template(tree_node*)
???:0
0xd5954f complete_type_or_maybe_complain(tree_node*, tree_node*, int)
???:0
0xcdf1a7 tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xcde6fc tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd06d50 instantiate_class_template(tree_node*)
???:0
0xd5954f complete_type_or_maybe_complain(tree_node*, tree_node*, int)
???:0
0xcdf1a7 tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xcde6fc tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xcd6618 instantiate_decl(tree_node*, bool, bool)
???:0
0xbb8461 maybe_instantiate_decl(tree_node*)
???:0
0xbb9ebf mark_used(tree_node*, int)
???:0
0xaf673e build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
???:0
0xd22eaf finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
Changing `A` to `int` makes it compile, so this is a problem with
floating-point NTTPs.
