https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82702
--- Comment #3 from Marco Castelluccio <mcastelluccio at mozilla dot com> --- See also this comment: https://github.com/gcc-mirror/gcc/blob/3c311329bd71ab4589fced78baf30187e50b6d3f/gcc/gcov.c#L865. This used to be true, but it's not anymore.