[Bug c++/121932] [16 regression] ICE when building gdb trunk with LTO (tree code ‘template_parm_index’ is not supported in LTO stream)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121932

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2025-09-13
             Status|UNCONFIRMED                 |NEW

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced further to:
```
struct s1{
  template <long N> void f(int (&)[N]);
};
struct s2{
  void f(const s1);
};
void s2::f(const s1) {}
```

If we make s2::f not a member function of s2 but rather a global function GCC
does NOT ICE.