[Bug c++/90915] New: [9/10 Regression] ICE in has_attribute, at c-family/c-attribs.c:4221

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90915

            Bug ID: 90915
           Summary: [9/10 Regression] ICE in has_attribute, at
                    c-family/c-attribs.c:4221
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Changed between 20181118 and 20181125 :


$ cat z1.cc
struct S;
template<int> struct T
{
  static_assert (__builtin_has_attribute (((S *) 0) -> a, packed));
};


$ g++-10-20190616 -c z1.cc
z1.cc:4:53: warning: invalid use of incomplete type 'struct S'
    4 |   static_assert (__builtin_has_attribute (((S *) 0) -> a, packed));
      |                                                     ^~
z1.cc:1:8: note: forward declaration of 'struct S'
    1 | struct S;
      |        ^
z1.cc:4:59: internal compiler error: Segmentation fault
    4 |   static_assert (__builtin_has_attribute (((S *) 0) -> a, packed));
      |                                                           ^~~~~~
0xb933cf crash_signal
        ../../gcc/toplev.c:326
0x7a1872 has_attribute(unsigned int, tree_node*, tree_node*, tree_node*
(*)(tree_node*))
        ../../gcc/c-family/c-attribs.c:4221
0x6c2d46 cp_parser_has_attribute_expression
        ../../gcc/cp/parser.c:8584
0x6c2d46 cp_parser_unary_expression
        ../../gcc/cp/parser.c:8192
0x69f43f cp_parser_cast_expression
        ../../gcc/cp/parser.c:9346
0x69fc12 cp_parser_binary_expression
        ../../gcc/cp/parser.c:9448
0x6a0989 cp_parser_assignment_expression
        ../../gcc/cp/parser.c:9745
0x6a037d cp_parser_constant_expression
        ../../gcc/cp/parser.c:10029
0x6a0662 cp_parser_static_assert
        ../../gcc/cp/parser.c:14449
0x6cb8bc cp_parser_member_declaration
        ../../gcc/cp/parser.c:24393
0x6aa58a cp_parser_member_specification_opt
        ../../gcc/cp/parser.c:24259
0x6aa58a cp_parser_class_specifier_1
        ../../gcc/cp/parser.c:23400
0x6ac181 cp_parser_class_specifier
        ../../gcc/cp/parser.c:23662
0x6ac181 cp_parser_type_specifier
        ../../gcc/cp/parser.c:17424
0x6acd64 cp_parser_decl_specifier_seq
        ../../gcc/cp/parser.c:14120
0x6c9dc5 cp_parser_single_declaration
        ../../gcc/cp/parser.c:28165
0x6ca14c cp_parser_template_declaration_after_parameters
        ../../gcc/cp/parser.c:27846
0x6ca757 cp_parser_explicit_template_declaration
        ../../gcc/cp/parser.c:28094
0x6ca757 cp_parser_template_declaration_after_export
        ../../gcc/cp/parser.c:28113
0x6cd2c9 cp_parser_declaration
        ../../gcc/cp/parser.c:13183