[Bug c++/60573] New: [c++1y] ICE with defining generic function of nested class in class scope

["reichelt at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60573

            Bug ID: 60573
           Summary: [c++1y] ICE with defining generic function of nested
                    class in class scope
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org
                CC: abutcher at gcc dot gnu.org

The following invalid code snippet (compiled with "-std=c++1y") triggers
an ICE on trunk:

========================
struct A
{
  struct B
  {
    void foo(auto);
  };

  void B::foo(auto) {}
};
========================

bug.cc:8:19: internal compiler error: in poplevel_class, at
cp/name-lookup.c:2951
   void B::foo(auto) {}
                   ^
0x783517 poplevel_class()
        ../../gcc/gcc/cp/name-lookup.c:2951
0x666498 popclass()
        ../../gcc/gcc/cp/class.c:7129
0x6668fa pop_nested_class()
        ../../gcc/gcc/cp/class.c:7275
0x6c2961 cp_parser_direct_declarator
        ../../gcc/gcc/cp/parser.c:17519
0x6c2961 cp_parser_declarator
        ../../gcc/gcc/cp/parser.c:16986
0x6aaabd cp_parser_member_declaration
        ../../gcc/gcc/cp/parser.c:20397
0x6adefc cp_parser_member_specification_opt
        ../../gcc/gcc/cp/parser.c:20078
0x6adefc cp_parser_class_specifier_1
        ../../gcc/gcc/cp/parser.c:19306
0x6b07b0 cp_parser_class_specifier
        ../../gcc/gcc/cp/parser.c:19533
0x6b07b0 cp_parser_type_specifier
        ../../gcc/gcc/cp/parser.c:14331
0x6c8c80 cp_parser_decl_specifier_seq
        ../../gcc/gcc/cp/parser.c:11567
0x6ce809 cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:11157
0x6b2983 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:11106
0x6d9022 cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:11003
0x6d7d18 cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:10889
0x6d95ca cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:4030
0x6d95ca c_parse_file()
        ../../gcc/gcc/cp/parser.c:31645
0x7f9d43 c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1061
Please submit a full bug report, [etc.]

Adam, you might want to have a look at this one.