[Bug c++/60673] c++11 static thread_local members may cause a segfault when accessed via 'this->'

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60673

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> This seems to be fixed in GCC 5 onwards (and recent Clang versions).

It was not fixed until GCC 7.5, 8.4 and 9+.
Here is a reduced testcase which shows it was not fixed until then:
extern "C" void abort(void);
struct tt
{
  int *tt1 = new int{1};
  int bucket_count() const {return *tt1;}
};
struct A{
        static thread_local tt  s;

        int f() {
                return this->s.bucket_count();
        }
        int g() {
                return A::s.bucket_count();
        }
        int h() {
                return s.bucket_count();
        }
};
thread_local tt A::s;
int main() {
        if (A{}.f() != 1) abort();
        return 0;
}