https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69313
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- There have been a few reports of this error on the gcc-help mailing list. The only person who reported solving it (as far as I know) said it was due to bad values in the environment, see https://gcc.gnu.org/ml/gcc-help/2015-09/msg00078.html
