https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99465
Bug ID: 99465
Summary: Segmentation fault when put lambda into requires
clause
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hewillk at gmail dot com
Target Milestone: ---
The following code will trigger the segmentation fault of gcc-trunk:
template <auto = 0>
auto g() requires ([] { return 0; } ());
int main() { g(); }
godbolt: https://godbolt.org/z/4bsaPd
error message:
<source>: In substitution of 'template<auto <anonymous> > auto g() requires
(<lambda>)() [with auto <anonymous> = 0]':
<source>:4:16: required from here
<source>:2:6: required by the constraints of 'template<auto <anonymous> >
auto g() requires (<lambda>)()'
Segmentation fault
2 | auto g() requires ([] { return 0; } ());
| ~~~~~~~~~~~~~~~~~~^~~
0x1cee989 internal_error(char const*, ...)
???:0
0x7748f3 pp_cxx_parameter_mapping(cxx_pretty_printer*, tree_node*)
???:0
0x7de235 expr_to_string(tree_node*)
???:0
0x1d0a861 pp_format(pretty_printer*, text_info*)
???:0
0x1ced50a diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
???:0
0x1cee60d error_at(unsigned int, char const*, ...)
???:0
0x73c8ea constraints_satisfied_p(tree_node*, tree_node*)
???:0
0x9510c3 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
???:0
0x6db9c2 build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
???:0
0x97d1ec finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0x8dd92d c_parse_file()
???:0
0xa5bd12 c_common_parse_file()
???:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
