https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112374
--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Managed to reproduce now as -fcompare-debug failure: /home/jakub/src/gcc/obj46/./prev-gcc/xg++ -B/home/jakub/src/gcc/obj46/./prev-gcc/ -O2 -fno-exceptions -fno-rtti -fno-common -S pr112374.ii -Wno-narrowing -fcompare-debug -march=skylake-avx512 -mtune=skylake-avx512 xg++: error: pr112374.ii: ‘-fcompare-debug’ failure (length) Will try to reduce this now.