[Bug c++/90966] New: ICE in tsubst_copy, at cp/pt.c:16155

[frankhb1989 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90966

            Bug ID: 90966
           Summary: ICE in tsubst_copy, at cp/pt.c:16155
           Product: gcc
           Version: 9.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: frankhb1989 at gmail dot com
  Target Milestone: ---

template<typename I>
void f()
{
        using S = signed char;
        constexpr const S v[]{0};
}

int main()
{
        f<int>();
}

a.cc: In instantiation of 'void f() [with I = int]':
a.cc:10:9:   required from here
a.cc:5:20: internal compiler error: in tsubst_copy, at cp/pt.c:16155
    5 |  constexpr const S v[]{0};
      |                    ^