[Buildbot-devel] SetProperty extract_fn error handling

[Brian Fallik]

What is the correct error handling procedure for the extract_fn
callback parameter to SetProperty?  In the event that the return code
from the command is non-zero, how do I signal that failure to the
buildbot and abort the build?  My uneducated guess is to throw some
kind of exception from extract_fn, but this is just a guess.

Thanks,
brian