https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78028
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- That wouldn't be WONTFIX, but FIXED, the support of GCC release branches mean that the bug is just fixed on the release branch and later on will make it into some newer minor release, we can't fix released versions. But we really don't know, nobody has managed to reproduce it besides you. It might be a Ubuntu specific bug or whatever.
