http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51591
--- Comment #4 from Bud Davis <bdavis at gcc dot gnu.org> --- Upon closer reflection, the underlying problems is the OpenMP threads doing I/O while the units are being closed. So, stop shows in the output, followed by output from threads whose units have been destroyed, but the call to exit() handler has not yet terminated.
