[Bug c++/118822] [15 regression] ICE when building mariadb-10.6.21

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118822

--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
Reduction went badly:
```
struct mtr_t {                        ~mtr_t( {
    while
      int space not_free : mtr_t mtr;
```

Can someone else fix it up? I'm going back to bed for now.