https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90294
--- Comment #8 from Fred Krogh <siteg at mathalacarte dot com> --- My apologies for posting this. In my original code the program just quit at the point of the test. I thought I had more or less reproduced this in a small program. Clearly that is not the case. My code has changed to get around the bug, such change was needed regardless. I have not idea how to get this reproduced in a small program.