[Bug c++/122256] ICE: unexpected expression ‘One` of kind template_parm_index/Segmentation Fault from base method in constraint

[chris at pcserenity dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122256

--- Comment #2 from Christian Heimlich <chris at pcserenity dot com> ---
Occurs as far back as GCC 12.

In this example at least, if the base class function is fully qualified, i.e.

```
requires(Bar::enabled(Two))
```

neither ICE occurs.