git-bisect says this is the bad revision: commit 8189e12312ede991827efc6683b7ce8463deb0bf Author: Andrew Waldron <a.a.w@xxxxxx> Date: Fri Apr 18 07:30:36 2014 -0700 32552 (updated by 32560): fix segfault when using process substitution in anonymous function argument list Also disallow process substitution in function name position.