[Bug c++/60053] New: [c++1y] ICE with auto as member template function parameter

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60053

            Bug ID: 60053
           Summary: [c++1y] ICE with auto as member template function
                    parameter
           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 valid code snippet (compiled with "-std=c++1y") triggers an
ICE on trunk:

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

void A::foo(auto) {}

template<typename> struct B
{
  template<typename T> void bar(auto);
};
===============================================

bug.cc:11:2: internal compiler error: in pop_binding, at cp/name-lookup.c:375};
  ^
0x77d96a pop_binding(tree_node*, tree_node*)
        ../../gcc/gcc/cp/name-lookup.c:375
0x5c3027 poplevel(int, int, int)
        ../../gcc/gcc/cp/decl.c:744
0x5fce98 end_template_decl()
        ../../gcc/gcc/cp/pt.c:3799
0x6cb60f cp_parser_template_declaration_after_export
        ../../gcc/gcc/cp/parser.c:22938
0x6d69b9 cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:10947
0x6d54a8 cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:10869
0x6d6d8a cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:4014
0x6d6d8a c_parse_file()
        ../../gcc/gcc/cp/parser.c:31528
0x7f66d3 c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1060
Please submit a full bug report, [etc.]

If I just leave out the name "T" of the template parameter, the code compiles
fine. This is probably related to PR60052.