mozilla/rr — pull request #352 by cgjones (2013-08-22 05:36:17+00:00)
Title: A SIGCHLD can come in before our rbc-interrupt SIGIO, so ignore that possible extraneous SIGIO.

Resolves #348. Resolves #291. (Symptoms are identical anyway, and the same SIGCHLD/USR_SCHED circumstances exist; haven't tested fix with FF though.)