[Bug c++/86183] New: Scoped enumeration instantiated even if not required

[zhonghao at pku dot org.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86183

            Bug ID: 86183
           Summary: Scoped enumeration instantiated even if not required
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhonghao at pku dot org.cn
  Target Milestone: ---

gcc produces errors when compiling the following code:

template<typename T>
struct A {
 enum class B {
 X = T::value
 };
};

int main() {
 A<int> a;
}

A previous version of clang++ also produces errors when compiling the above
code, but it was fixed in https://bugs.llvm.org/show_bug.cgi?id=10044

Shall gcc also fix the problem?