[Bug c++/84609] New: internal compiler error: in cp_parser_abort_tentative_parse, at cp/parser.c:28960

[vegard.nossum at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84609

            Bug ID: 84609
           Summary: internal compiler error: in
                    cp_parser_abort_tentative_parse, at cp/parser.c:28960
           Product: gcc
           Version: 8.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vegard.nossum at gmail dot com
  Target Milestone: ---

Input:

struct s {
  int a __attribute__((aligned([](char *) {})));
};

Output:

$ xgcc -x c++ -std=c++14 -O3 -Wall -fpermissive -c -
<stdin>:2:47: internal compiler error: in cp_parser_abort_tentative_parse, at
cp/parser.c:28960
0xe87f54 cp_parser_abort_tentative_parse
        /home/vegard/git/gcc/gcc/cp/parser.c:28959
0xfdb287 cp_parser_member_declaration
        /home/vegard/git/gcc/gcc/cp/parser.c:23597
0xf10d9b cp_parser_member_specification_opt
        /home/vegard/git/gcc/gcc/cp/parser.c:23308
0xf10d9b cp_parser_class_specifier_1
        /home/vegard/git/gcc/gcc/cp/parser.c:22450
0xf1fcbb cp_parser_class_specifier
        /home/vegard/git/gcc/gcc/cp/parser.c:22702
0xf1fcbb cp_parser_type_specifier
        /home/vegard/git/gcc/gcc/cp/parser.c:16708
0xf8520a cp_parser_decl_specifier_seq
        /home/vegard/git/gcc/gcc/cp/parser.c:13573
0xfa0d60 cp_parser_simple_declaration
        /home/vegard/git/gcc/gcc/cp/parser.c:12882
0xfa8c88 cp_parser_block_declaration
        /home/vegard/git/gcc/gcc/cp/parser.c:12827
0xffb8d5 cp_parser_declaration
        /home/vegard/git/gcc/gcc/cp/parser.c:12724
0xff298b cp_parser_declaration_seq_opt
        /home/vegard/git/gcc/gcc/cp/parser.c:12600
0xff3fb3 cp_parser_translation_unit
        /home/vegard/git/gcc/gcc/cp/parser.c:4559
0xff3fb3 c_parse_file()
        /home/vegard/git/gcc/gcc/cp/parser.c:38820
0x15a0525 c_common_parse_file()
        /home/vegard/git/gcc/gcc/c-family/c-opts.c:1132

Version:

xgcc (GCC) 8.0.1 20180204 (experimental)

built from git fdae6180ad24fa6303fa046114f3e4b66b8db34d

Version 7.3.0 don't seem to be affected AFAICS.

Test case was reduced by C-Reduce.

It looks related to bug #84606 to me because of the lambda-inside-attribute,
but the stack trace is completely different.