https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103231
--- Comment #1 from hubicka at kam dot mff.cuni.cz --- > [659] % > [659] % gcctk -O0 -w small.c > [660] % > [660] % gcctk -O1 -w small.c > [661] % gcctk -O1 -w small.c > [662] % gcctk -O1 -w small.c > gcctk: internal compiler error: Segmentation fault signal terminated program > cc1 > Please submit a full bug report, > with preprocessed source if appropriate. > See <https://gcc.gnu.org/bugs/> for instructions. Backtrace here would be useful. It is bit strange that you did not get it from error message. One can use -S -wrapper gdb,--args to make the cc1 executed within gdb. > [663] %