Avoid static destructors during program exit - #1471
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Function-local static variables must either be marked constexpr or never_destroyed. Otherwise, their order of destruction during program exit is indeterminate and can lead to undefined behavior.
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Function-local static variables must either be marked constexpr or never_destroyed. Otherwise, their order of destruction during program exit is indeterminate and can lead to undefined behavior.
https://en.cppreference.com/cpp/language/siof
https://google.github.io/styleguide/cppguide.html#Static_and_Global_Variables