[Bug c/93812] New: [9/10 Regression] ICE in get_constant, at c-family/c-format.c:325

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93812

            Bug ID: 93812
           Summary: [9/10 Regression] ICE in get_constant, at
                    c-family/c-format.c:325
           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 20181111 and 20181118 :


$ cat z1.c
void f(void)
{
  __attribute__((__format__(__gcc_gfc__, 1, 2))) void f() ;
  f();
}


$ gcc-9-20181111 -c z1.c -Wall
$
$ gcc-10-20200216 -c z1.c -Wall
z1.c: In function 'f':
z1.c:4:3: warning: 'format' attribute argument 2 value '1' exceeds the number
of function parameters 0 [-Wattributes]
    4 |   f();
      |   ^
z1.c:4:3: internal compiler error: in get_constant, at c-family/c-format.c:325
0x6a1b4b get_constant
        ../../gcc/c-family/c-format.c:325
0x6a1b4b decode_format_attr
        ../../gcc/c-family/c-format.c:378
0x6a1f77 check_function_format(tree_node const*, tree_node*, int, tree_node**,
vec<unsigned int, va_heap, vl_ptr>*)
        ../../gcc/c-family/c-format.c:1183
0x6960e5 check_function_arguments(unsigned int, tree_node const*, tree_node
const*, int, tree_node**, vec<unsigned int, va_heap, vl_ptr>*)
        ../../gcc/c-family/c-common.c:5726
0x62e77c build_function_call_vec(unsigned int, vec<unsigned int, va_heap,
vl_ptr>, tree_node*, vec<tree_node*, va_gc, vl_embed>*, vec<tree_node*, va_gc,
vl_embed>*, tree_node*)
        ../../gcc/c/c-typeck.c:3117
0x64c4c1 c_parser_postfix_expression_after_primary
        ../../gcc/c/c-parser.c:10494
0x63e66b c_parser_postfix_expression
        ../../gcc/c/c-parser.c:10169
0x648252 c_parser_unary_expression
        ../../gcc/c/c-parser.c:8266
0x64927f c_parser_cast_expression
        ../../gcc/c/c-parser.c:8108
0x649539 c_parser_binary_expression
        ../../gcc/c/c-parser.c:7911
0x64a3e5 c_parser_conditional_expression
        ../../gcc/c/c-parser.c:7645
0x64a930 c_parser_expr_no_commas
        ../../gcc/c/c-parser.c:7562
0x64ab92 c_parser_expression
        ../../gcc/c/c-parser.c:10630
0x64b22b c_parser_expression_conv
        ../../gcc/c/c-parser.c:10663
0x65ac7b c_parser_statement_after_labels
        ../../gcc/c/c-parser.c:6294
0x65cd82 c_parser_compound_statement_nostart
        ../../gcc/c/c-parser.c:5800
0x65d516 c_parser_compound_statement
        ../../gcc/c/c-parser.c:5616
0x65ed35 c_parser_declaration_or_fndef
        ../../gcc/c/c-parser.c:2504
0x665d67 c_parser_external_declaration
        ../../gcc/c/c-parser.c:1746
0x666889 c_parser_translation_unit
        ../../gcc/c/c-parser.c:1619