[Bug c++/58500] New: Crash with auto as function parameter

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58500

            Bug ID: 58500
           Summary: Crash with auto as 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) testcase crashes when compiled with "-std=gnu++1y":

=============================
struct A {};

void foo(auto (A::*)());
=============================

bug.cc:3:22: internal compiler error: in add_implicit_template_parms, at
cp/parser.c:29007
 void foo(auto (A::*)());
                      ^
0x647b5a add_implicit_template_parms
        ../../gcc/gcc/cp/parser.c:29007
0x647b5a cp_parser_parameter_declaration_list
        ../../gcc/gcc/cp/parser.c:18052
0x647d56 cp_parser_parameter_declaration_clause
        ../../gcc/gcc/cp/parser.c:17867
0x6428d4 cp_parser_direct_declarator
        ../../gcc/gcc/cp/parser.c:16819
0x6428d4 cp_parser_declarator
        ../../gcc/gcc/cp/parser.c:16690
0x649699 cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:16258
0x64a34f cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:10986
0x64c1b0 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:10867
0x6551ce cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:10764
0x653f2d cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:10650
0x655806 cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:3939
0x655806 c_parse_file()
        ../../gcc/gcc/cp/parser.c:28893
0x768184 c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1046
Please submit a full bug report, [etc.]