https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66563
--- Comment #12 from Kazumoto Kojima <kkojima at gcc dot gnu.org> --- All my 4.9 compilers don't fail for given pre-processed source. Could you show us segfaultlog with running the following commands? gcc -E wmfire.c -o wmfire.i strace -i -f -o segfaultlog /usr/lib/gcc/sh4-linux-gnu/4.9/cc1 wmfire.i