https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97034
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> --- (In reply to Arthur O'Dwyer from comment #5) > Is mine the same bug? Mine is also a regression (trunk crashes where GCC > 10.2 had succeeded). > > // https://godbolt.org/z/Ysh6as > struct C { void f(auto) noexcept; }; > void C::f(auto) noexcept(C::x) {} > > Compile with -std=c++20: > > > <source>:3:29: error: 'x' is not a member of 'C' > 3 | void C::f(auto) noexcept(C::x) {} > | ^ > <source>:3:6: error: declaration of 'void C::f(auto:2)' has a different > exception specifier > 3 | void C::f(auto) noexcept(C::x) {} > | ^ > <source>:2:17: note: from previous declaration 'void C::f(auto:1) noexcept' > 2 | struct C { void f(auto) noexcept; }; > | ^ > <source>:3:30: internal compiler error: in type_dependent_expression_p, at > cp/pt.c:27166 > 3 | void C::f(auto) noexcept(C::x) {} > | ^ > 0x1cc31d9 internal_error(char const*, ...) > ???:0 > 0x6b25f7 fancy_abort(char const*, int, char const*) > ???:0 > 0x8ee70a type_dependent_expression_p(tree_node*) > ???:0 > 0x137d4f3 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), > void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*, > tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), > void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) > ???:0 > 0x1381b55 walk_tree_without_duplicates_1(tree_node**, tree_node* > (*)(tree_node**, int*, void*), void*, tree_node* (*)(tree_node**, int*, > tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, > default_hash_traits<tree_node*> >*)) > ???:0 > 0x8ea937 instantiation_dependent_uneval_expression_p(tree_node*) > ???:0 > 0x8f2198 instantiation_dependent_expression_p(tree_node*) > ???:0 > 0x8f2216 uses_template_parms(tree_node*) > ???:0 > 0x78ffe8 duplicate_decls(tree_node*, tree_node*, bool, bool) > ???:0 > 0x79a2b6 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*, > decl_context, int, tree_node**) > ???:0 > 0x79dda6 start_function(cp_decl_specifier_seq*, cp_declarator const*, > tree_node*) > ???:0 > 0x8d803d c_parse_file() > ???:0 > 0xa54072 c_common_parse_file() > ???:0 I think that is a different problem (the original problem here was with deduction guides).
