https://gcc.gnu.org/bugzilla/show_bug.cgi?id=75860
--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> --- The preprocessed source is too big to be meaningful. I did try to shorten it but still too big and using so many firefox header files. It will be faster if you could download the firefox-48 source and try it. Using the following CFLAGS="-g -w -O0 -fsanitize=address -fno-omit-frame-pointer" CXXFLAGS=$CFLAGS ../firefox-48.0/configure --prefix=/home/vitti/1tb/vitti/local/firefox-48.0-address