[Bug c/119207] New: ICE after error with flexible array definition and too large size for array

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119207

            Bug ID: 119207
           Summary: ICE after error with flexible array definition and too
                    large size for array
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: error-recovery, ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Testcase:
```
struct flexible {
  int length;
  int data[];
};
struct flexible x
= {0,{ [-2ull] = 0 }};
```

Gives correctly an error message but then ICEs:
```
<source>:6:1: error: size of array is too large
    6 | = {0,{ [-2ull] = 0 }};
      | ^
<source>:6:1: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in add_flexible_array_elts_to_size, at
c/c-decl.c:4914
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
```