[Bug libgomp/125691] New: ICE when parsing malformed #pragma omp simd loop with missing for parentheses

[s.kimura.h41104 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125691

            Bug ID: 125691
           Summary: ICE when parsing malformed #pragma omp simd loop with
                    missing for parentheses
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgomp
          Assignee: unassigned at gcc dot gnu.org
          Reporter: s.kimura.h41104 at gmail dot com
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---

Compiler Explorer: https://godbolt.org/z/6ocMqscPK

Reproducer:
```
void foo() {
  int i;
  #pragma omp simd
  for i = 0;
}
```

Backtrace:
<source>:4:7: error: expected '(' before 'i'
    4 |   for i = 0;
      |       ^
      |       (
<source>:4:7: internal compiler error: in cp_parser_omp_for_loop, at
cp/parser.cc:50387
0x29f7b88 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
        ???:0
0x29ec7cb internal_error(char const*, ...)
        ???:0
0xb34382 fancy_abort(char const*, int, char const*)
        ???:0
0xd880b3 c_parse_file()
        ???:0
0xf17d59 c_common_parse_file()
        ???:0

This ICE goes back to gcc-14:
https://godbolt.org/z/ej1EMKc4G