ASS[0] is documented for Linux (and for POSIX) but i'm failing to find any information on how this applies to Cygwin. I assume, since there are no "real" signals on Cygwin, that it's not possible for a signal handler to break the state of some function that happened to be executed when the signal handler was triggered. But i could be wrong. [0]: http://man7.org/linux/man-pages/man7/signal-safety.7.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: OpenPGP digital signature URL: <http://cygwin.com/pipermail/cygwin/attachments/20190319/e00eefd4/attachment.sig>