fix exponential behavior bug when traversing CompNode graph
fix exponential behavior bug when traversing CompNode graph

Ignore-this: ebc8699c3a3d09694002854d5b6504f2

darcs-hash:8ed5b6a62847abf2e3266b6f7dbff06c587e86d4

dpwright/jhc,dpwright/jhc,dpwright/jhc,dpwright/jhc