https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68348
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> --- There are some hundred libstdc++ testsuite failures with the same backtrace for alpha-linux-gnu [1] and probably also s390 [2]. [1] https://gcc.gnu.org/ml/gcc-testresults/2015-11/msg03084.html [2] https://gcc.gnu.org/ml/gcc-testresults/2015-11/msg03083.html