[Bug c++/72842] New: non-type template-parameter of type void

["barry.revzin at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72842

            Bug ID: 72842
           Summary: non-type template-parameter of type void
           Product: gcc
           Version: 5.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: barry.revzin at gmail dot com
  Target Milestone: ---

The following compiles on gcc (and clang), across all versions I've tried:

template <class T, T...>
void foo() { }

int main() {
    foo<void>();
}

But void isn't a valid non-type template parameter type.