https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78387
--- Comment #2 from Andrew Benson <abensonca at gmail dot com> --- OK - thanks. I hadn't realized that the internal I/O operations weren't threadsafe - I guess I've just been fortunate to avoid this with previous versions of gfortran. I'll update my code to use critical sections as necessary. Thanks for the fast response!
