https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92359
--- Comment #2 from Bence Szabó <sbence92 at gmail dot com> --- Is it a subtle thing that all implementations missed or is it not specified very well in the standard? As far as I could tell there's no specific rule for this case. The standard is detailed about member statics, member functions etc but not about this. Thoughts?