https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97034
Arthur O'Dwyer <arthur.j.odwyer at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |arthur.j.odwyer at gmail dot com --- Comment #5 from Arthur O'Dwyer <arthur.j.odwyer at gmail dot com> --- 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