[Bug c++/100326] New: Crash with `#pragma GCC unroll` when calling value which can't be called in template function

[ryan_greenblatt at brown dot edu via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100326

            Bug ID: 100326
           Summary: Crash with `#pragma GCC unroll` when calling value
                    which can't be called in template function
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ryan_greenblatt at brown dot edu
  Target Milestone: ---

```
template<typename T> void f(T v) {
    #pragma GCC unroll v()
    for (;;) {
    }
} 

int main() {
  f(0);
}
```
https://godbolt.org/z/8bEscGszK

Amusingly, this gets gcc and clang.