[Bug c++/70139] [5/6 Regression] -fno-ellide-constructor makes static std::regex to throw

[ostash at ostash dot kiev.ua]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70139

--- Comment #6 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> ---
I'm not sure about bug prioritizing policies, but for me it looks like this
should get P1 or documentation/release notes for GCC5 and GCC6 should state
that -fno-ellide-constructor is broken.