[Bug c++/58637] New: [c++1y] ICE with wrong usage of template<> in front of function containing auto parameter

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58637

            Bug ID: 58637
           Summary: [c++1y] ICE with wrong usage of template<> in front of
                    function containing auto 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 invalid line of code (compiled with "-std=c++1y") triggers an ICE
on trunk (since at least 4.9.0-20130920):

=============================
template<> void foo(auto);
=============================

bug.cc:1:21: internal compiler error: in add_implicit_template_parms, at
cp/parser.c:28978
 template<> void foo(auto);
                     ^
0x64f044 add_implicit_template_parms
        ../../gcc/gcc/cp/parser.c:28978
0x64f044 cp_parser_parameter_declaration_list
        ../../gcc/gcc/cp/parser.c:18067
0x64f356 cp_parser_parameter_declaration_clause
        ../../gcc/gcc/cp/parser.c:17882
0x649f04 cp_parser_direct_declarator
        ../../gcc/gcc/cp/parser.c:16834
0x649f04 cp_parser_declarator
        ../../gcc/gcc/cp/parser.c:16705
0x650cc7 cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:16268
0x651fd4 cp_parser_single_declaration
        ../../gcc/gcc/cp/parser.c:22665
0x6553fd cp_parser_explicit_specialization
        ../../gcc/gcc/cp/parser.c:13986
0x65cac5 cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:10726
0x65b5aa cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:10659
0x65ce76 cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:3939
0x65ce76 c_parse_file()
        ../../gcc/gcc/cp/parser.c:28911
0x7708b3 c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1046
Please submit a full bug report, [etc.]