https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94257
Bug ID: 94257 Summary: ICE in inline nested namespace Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: pacoarjonilla at yahoo dot es Target Milestone: --- Only in GCC10 inline namespace B { inline namespace B { } } inline namespace B { class C { friend void f(); }; } $> g++10 bug.cc cairo.cc:4:18: error: ‘namespace B { }’ conflicts with a previous declaration 4 | inline namespace B { | ^ cairo.cc:1:18: note: previous declaration ‘namespace B { }’ 1 | inline namespace B { | ^ cairo.cc:6:19: internal compiler error: in do_push_nested_namespace, at cp/name-lookup.c:7225 6 | friend void f(); | ^ 0x65c058 do_push_nested_namespace ../../gcc/gcc/cp/name-lookup.c:7225 0x991b8c push_nested_namespace(tree_node*) ../../gcc/gcc/cp/name-lookup.c:7494 0x951384 do_friend(tree_node*, tree_node*, tree_node*, tree_node*, overload_flags, bool) ../../gcc/gcc/cp/friend.c:626 0x91cb5e grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*, decl_context, int, tree_node**) ../../gcc/gcc/cp/decl.c:13364 0x93877f grokfield(cp_declarator const*, cp_decl_specifier_seq*, tree_node*, bool, tree_node*, tree_node*) ../../gcc/gcc/cp/decl2.c:841 0x9d936b cp_parser_member_declaration ../../gcc/gcc/cp/parser.c:25259 0x9adb31 cp_parser_member_specification_opt ../../gcc/gcc/cp/parser.c:24703 0x9adb31 cp_parser_class_specifier_1 ../../gcc/gcc/cp/parser.c:23800 0x9afbe3 cp_parser_class_specifier ../../gcc/gcc/cp/parser.c:24107 0x9afbe3 cp_parser_type_specifier ../../gcc/gcc/cp/parser.c:17666 0x9b0cbb cp_parser_decl_specifier_seq ../../gcc/gcc/cp/parser.c:14314 0x9b1701 cp_parser_simple_declaration ../../gcc/gcc/cp/parser.c:13568 0x9da782 cp_parser_declaration ../../gcc/gcc/cp/parser.c:13388 0x9da4c2 cp_parser_toplevel_declaration ../../gcc/gcc/cp/parser.c:13416 0x9da4c2 cp_parser_declaration_seq_opt ../../gcc/gcc/cp/parser.c:13264 0x9da4c2 cp_parser_namespace_body ../../gcc/gcc/cp/parser.c:19644 0x9da4c2 cp_parser_namespace_definition ../../gcc/gcc/cp/parser.c:19622 0x9da8c8 cp_parser_declaration ../../gcc/gcc/cp/parser.c:13368 0x9daf0a cp_parser_translation_unit ../../gcc/gcc/cp/parser.c:4731 0x9daf0a c_parse_file() ../../gcc/gcc/cp/parser.c:43758 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.