[Bug c++/95560] [10/11 Regression] ICE in comptypes, at cp/typeck.c:1498 since r10-4254-ge0d91792eec490d1

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95560

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
               Host|x86_64-w64-mingw32          |
     Ever confirmed|0                           |1
                 CC|                            |edlinger at gcc dot gnu.org,
                   |                            |marxin at gcc dot gnu.org
   Last reconfirmed|                            |2020-06-09
              Build|x86_64-w64-mingw32          |
            Summary|internal compiler error:    |[10/11 Regression] ICE in
                   |Segmentation fault          |comptypes, at
                   |                            |cp/typeck.c:1498 since
                   |                            |r10-4254-ge0d91792eec490d1
             Status|UNCONFIRMED                 |NEW
             Target|x86_64-w64-mingw32          |

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r10-4254-ge0d91792eec490d1.

Reduced test-case:

$ cat pr95560.ii
template <typename> void fn1() {
  bool ready;
  enum class State { ready };
}

$ g++ -c -std=c++2a pr95560.ii
pr95560.ii: In function ‘void fn1()’:
pr95560.ii:3:22: internal compiler error: in comptypes, at cp/typeck.c:1498
    3 |   enum class State { ready };
      |                      ^~~~~
0x6be442 comptypes(tree_node*, tree_node*, int)
        /home/marxin/Programming/gcc/gcc/cp/typeck.c:1498
0x9ab7ea check_local_shadow
        /home/marxin/Programming/gcc/gcc/cp/name-lookup.c:2765
0x9ab7ea do_pushdecl
        /home/marxin/Programming/gcc/gcc/cp/name-lookup.c:3112
0x9ac140 pushdecl(tree_node*, bool)
        /home/marxin/Programming/gcc/gcc/cp/name-lookup.c:3177
0x93c722 build_enumerator(tree_node*, tree_node*, tree_node*, tree_node*,
unsigned int)
        /home/marxin/Programming/gcc/gcc/cp/decl.c:15922
0x9cd7a7 cp_parser_enumerator_definition
        /home/marxin/Programming/gcc/gcc/cp/parser.c:19544
0x9cd7a7 cp_parser_enumerator_list
        /home/marxin/Programming/gcc/gcc/cp/parser.c:19473
0x9cd7a7 cp_parser_enum_specifier
        /home/marxin/Programming/gcc/gcc/cp/parser.c:19404
0x9cd7a7 cp_parser_type_specifier
        /home/marxin/Programming/gcc/gcc/cp/parser.c:17734
0x9cdd62 cp_parser_decl_specifier_seq
        /home/marxin/Programming/gcc/gcc/cp/parser.c:14410
0x9ce941 cp_parser_simple_declaration
        /home/marxin/Programming/gcc/gcc/cp/parser.c:13664
0x9d07ea cp_parser_declaration_statement
        /home/marxin/Programming/gcc/gcc/cp/parser.c:13217
0x9d146a cp_parser_statement
        /home/marxin/Programming/gcc/gcc/cp/parser.c:11523
0x9d2398 cp_parser_statement_seq_opt
        /home/marxin/Programming/gcc/gcc/cp/parser.c:11889
0x9d2478 cp_parser_compound_statement
        /home/marxin/Programming/gcc/gcc/cp/parser.c:11839
0x9e9a65 cp_parser_function_body
        /home/marxin/Programming/gcc/gcc/cp/parser.c:23110
0x9e9a65 cp_parser_ctor_initializer_opt_and_function_body
        /home/marxin/Programming/gcc/gcc/cp/parser.c:23161
0x9ecd9d cp_parser_function_definition_after_declarator
        /home/marxin/Programming/gcc/gcc/cp/parser.c:29057
0x9edd89 cp_parser_function_definition_from_specifiers_and_declarator
        /home/marxin/Programming/gcc/gcc/cp/parser.c:28973
0x9edd89 cp_parser_init_declarator
        /home/marxin/Programming/gcc/gcc/cp/parser.c:20721
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