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.