https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90646
--- Comment #8 from myLC at gmx dot net --- (In reply to Jonathan Wakely from comment #7) > It could also be Bug 90557 (which is fixed in the gcc-9-branch but present > in the gcc 9.1.0 release) but the symptoms don't look similar. This is possible. I built 9.1.0 from source and got new issues, though. Chances are, my system could be too old. I'm moving back to gcc-8 until I've updated. This feels too much like poking around in the dark.