[Bug c++/59988] Failing to specialize template class

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59988

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I'm adding a testcase and closing the bug. By the way, both current EDG and
clang agree with GCC.