tomprince/buildbot — comment on commit 632ddc82b9860a0f45550b1879934621d244bfb5
File: master/buildbot/process/properties.py line 356
By djmitche:

I'm not sure if it's important in this case, but `gatherResults` will leave unhandled exceptions - http://twistedmatrix.com/trac/ticket/5159