https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67905
--- Comment #1 from Eric Gallager <egall at gwmail dot gwu.edu> --- Actually, disregard my previous statement about mail-report.log being incomplete; everything ended up in it, despite the messages printed while making it. The part about it being un-emailable was still true though; it was only after rebooting and /dev/null successfully being recreated that I was able to send it, which ended up as https://gcc.gnu.org/ml/gcc-testresults/2015-10/msg00910.html
