[Bug c++/54002] [C++0x] Initializing constexpr static member using constexpr static method fails

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54002

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I'm adding the testcase to the testsuite and closing the bug.