https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70037
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- Created attachment 47038 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47038&action=edit New testcase I tried updating the attachment to C++2a syntax and it crashes differently: g++ -std=gnu++20 70037.ii -Wno-deprecated-declarations -Wno-literal-suffix 70037.ii:20114:37: internal compiler error: in push_access_scope, at cp/pt.c:233 20114 | : _Inherited(__elements...) { } | ^ 0x9a00a6 push_access_scope(tree_node*) /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:232 0x89f53d constraints_satisfied_p /home/jwakely/src/gcc/gcc/gcc/cp/constraint.cc:2528 0x86c493 add_method(tree_node*, tree_node*, bool) /home/jwakely/src/gcc/gcc/gcc/cp/class.c:1097 0x9f8773 finish_member_declaration(tree_node*) /home/jwakely/src/gcc/gcc/gcc/cp/semantics.c:3275 0x98c46a cp_parser_template_declaration_after_parameters /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:28664 0x98cd8d cp_parser_explicit_template_declaration /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:28838 0x98cd8d cp_parser_template_declaration_after_export /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:28857 0x98e20d cp_parser_member_declaration /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:24583 0x9655fa cp_parser_member_specification_opt /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:24510 0x9655fa cp_parser_class_specifier_1 /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:23597 0x967a39 cp_parser_class_specifier /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:23913 0x967a39 cp_parser_type_specifier /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:17511 0x968964 cp_parser_decl_specifier_seq /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:14203 0x98c055 cp_parser_single_declaration /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:28909 0x98c3ef cp_parser_template_declaration_after_parameters /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:28572 0x98cd8d cp_parser_explicit_template_declaration /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:28838 0x98cd8d cp_parser_template_declaration_after_export /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:28857 0x98fad9 cp_parser_declaration /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:13241 0x99057c cp_parser_declaration_seq_opt /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:13168 0x99057c cp_parser_namespace_body /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:19479 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.
