https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81536
David Binderman <dcb314 at hotmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |RESOLVED Resolution|--- |WORKSFORME --- Comment #2 from David Binderman <dcb314 at hotmail dot com> --- I cannot reproduce it here. I tried about 80 recent versions of gcc and I also used the -g -O3 flags. I suspect a hardware fault here.