https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100150
--- Comment #6 from David Binderman <dcb314 at hotmail dot com> --- The command line seems to be: gcc -o src/bin/tolua.o -c -g -O3 -funroll-all-loops -freport-bug -flto=auto -ffat-lto-objects -fexceptions -pipe -Wall -Werror=format-security -fstack-protector-strong -fasynchronous-unwind-tables -fstack-clash-protection src/bin/tolua.c git bisect seems to indicate commit 329d2f0df7d6d22c87ab3338b94caef68139cd58, which seems to be something about GORI, which AFAIK isn't lto related.