[Bug c++/121087] New: internal compiler error: Segmentation fault initialize_vtbl_ptrs since 14.1

[mario.rodriguezb1 at um dot es via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121087

            Bug ID: 121087
           Summary: internal compiler error: Segmentation fault
                    initialize_vtbl_ptrs since 14.1
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mario.rodriguezb1 at um dot es
  Target Milestone: ---

ICE in:

Program

```
struct foo{
    foo(const this&) : array{ 0 } {};
  };
```

Stack dump

```
<source>:2:33: internal compiler error: Segmentation fault
    2 |     foo(const this&) : array{ 0 } {};
      |                                 ^
0x2879ca5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
        ???:0
0x289b986 internal_error(char const*, ...)
        ???:0
0xc20905 initialize_vtbl_ptrs(tree_node*)
        ???:0
0xc2da3f emit_mem_initializers(tree_node*)
        ???:0
0xd20193 c_parse_file()
        ???:0
0xe8a449 c_common_parse_file()
        ???:0
```

To quickly reproduce:

https://godbolt.org/z/P3d87a65q