http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58980
Bug ID: 58980
Summary: [4.7/4.8/4.9 Regression] ICE with invalid enum
declaration
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
The following invalid code snippet triggers an ICE since GCC 4.6.0:
==============================
template<typename> struct A
{
enum A::B::C {};
};
==============================
bug.cc:3:14: internal compiler error: in is_ancestor, at cp/name-lookup.c:2721
enum A::B::C {};
^
0x718fff is_ancestor(tree_node*, tree_node*)
../../gcc/gcc/cp/name-lookup.c:2720
0x65b41e cp_parser_enum_specifier
../../gcc/gcc/cp/parser.c:15348
0x645d81 cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:14176
0x65e867 cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:11449
0x665c33 cp_parser_member_declaration
../../gcc/gcc/cp/parser.c:19931
0x645fdd cp_parser_member_specification_opt
../../gcc/gcc/cp/parser.c:19786
0x645fdd cp_parser_class_specifier_1
../../gcc/gcc/cp/parser.c:19030
0x645fdd cp_parser_class_specifier
../../gcc/gcc/cp/parser.c:19257
0x645fdd cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:14204
0x65e867 cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:11449
0x664443 cp_parser_single_declaration
../../gcc/gcc/cp/parser.c:22748
0x66494c cp_parser_template_declaration_after_export
../../gcc/gcc/cp/parser.c:22624
0x670969 cp_parser_declaration
../../gcc/gcc/cp/parser.c:10849
0x66f4f8 cp_parser_declaration_seq_opt
../../gcc/gcc/cp/parser.c:10771
0x670e36 cp_parser_translation_unit
../../gcc/gcc/cp/parser.c:4007
0x670e36 c_parse_file()
../../gcc/gcc/cp/parser.c:31045
0x791113 c_common_parse_file()
../../gcc/gcc/c-family/c-opts.c:1046
Please submit a full bug report, [etc.]
