[Bug c++/108047] ice: unexpected expression of kind implicit_conv_expr

[slyfox at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108047

Sergei Trofimovich  changed:

   What|Removed |Added

 CC||slyfox at gcc dot gnu.org

--- Comment #4 from Sergei Trofimovich  ---
Noticed the same build failure on this week's gcc on apache-arrow-cpp-9.0.0.
Extracted small example:

namespace std {
template  class initializer_list;
struct Trans_NS___cxx11_basic_string {
  Trans_NS___cxx11_basic_string(const char *);
};
struct vector {
  vector(initializer_list);
};
} // namespace std
void key_value_metadata(std::vector, std::vector);
template  void TestWriteDifferentMetadata() {
  key_value_metadata({}, {""});
}

Not sure if it's valid, but gcc-12 still accepts it. Can re-reduce against
clang if needed.

$ ./gcc-git/bin/gcc  -c bug.cc.cc
bug.cc.cc: In function 'void TestWriteDifferentMetadata()':
bug.cc.cc:12:21: internal compiler error: unexpected expression
'(std::Trans_NS___cxx11_basic_string)""' of kind implicit_conv_expr
   12 |   key_value_metadata({}, {""});
  |   ~~^~
0x219cf54 diagnostic_impl(rich_location*, diagnostic_metadata const*, int, char
const*, __va_list_tag (*) [1], diagnostic_t)
???:0
0x219dba6 internal_error(char const*, ...)
???:0
0x9d4fee cxx_eval_constant_expression(constexpr_ctx const*, tree_node*,
value_cat, bool*, bool*, tree_node**)
???:0

[Bug c++/108047] ice: unexpected expression of kind implicit_conv_expr

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108047

David Binderman  changed:

   What|Removed |Added

 CC||jason at gcc dot gnu.org

--- Comment #3 from David Binderman  ---
09c91caeb84e7c36 worked fine. 

The remaining interval seems to be [09c91caeb84e7c36..7410032a772a9e77], 
which is six revisions, four of which are by Jason and two unrelated
non-C++.

Jason's best opinion sought.

[Bug c++/108047] ice: unexpected expression of kind implicit_conv_expr

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108047

--- Comment #2 from David Binderman  ---
That worked fine, so trying 09c91caeb84e7c36.

[Bug c++/108047] ice: unexpected expression of kind implicit_conv_expr

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108047

--- Comment #1 from David Binderman  ---
I am having a go at a git bisect. Trying 892e8c520be37d0a.