[Bug c++/123347] [16 regression] ICE when building libprojectm-3.1.12 (tree check: expected record_type or union_type or qual_union_type, have pointer_type in potential_constant_expression_1, at cp/constexpr.cc:12075)

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123347

--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
After Cvise, I have

namespace std {
struct type_info;
}
int OVptr;
template <class> int IsctProblem_gv1 = typeid(OVptr);

The bug seems to start sometime between g:e10dc8fa17ac633d,
dated 20251215 and g:3dfd545671f0b3ff, the day after.