https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68650
--- Comment #1 from Georg Koppen <gk at torproject dot org> --- To give a bit more context the flags used for compilation are: export CFLAGS="-fsanitize=address -Dxmalloc=myxmalloc" export CXXFLAGS="-fsanitize=address -Dxmalloc=myxmalloc" export LDFLAGS="-fsanitize=address" (and there are some Firefox specific configure switches involved like ac_add_options --enable-address-sanitizer ac_add_options --disable-jemalloc ac_add_options --disable-elf-hack )