If the Mask input pin to Dir (File Advanced) is something like a filepath instead of a mask, it will crash vvvv.
In the attached patch, hover your mouse over the Dir output pins and down it goes.
This is with 34.2 x86, did not test others yet. With Dir (File), the node just turns red, much more polite behavior!
DirAdvancedCrash.v4p (2.1 kB)