https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78054
anlauf at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |anlauf at gcc dot gnu.org --- Comment #2 from anlauf at gcc dot gnu.org --- On x86_64-pc-linux-gnu I see it too when running the executable under valgrind. Commenting line 12 ! a = a ! This used to ICE. the problem disappears.