Stephan:
Has anyone experienced those kind of problems which only occur with the "-O" flag, but not without it?
Compiler crashes caused by -O happen. But I think in your case looking at bugzilla isn't a big help, because the possible causes are too many.
Unfortunately, in my case the code crashed in a position late in some iteration loop, so I can't easily reproduce it in a simple program to file a bug report.
If you want the bug to be fixed, you will probably have to localize and submit it.
Bye, bearophile
