[Buildbot-devel] evaluation of WithProperties under a step containing a doStepIf

[Tom Prince]

The current behavior was added when I added support for both doStepIf
and renderables to return deferreds, allowing things like
https://github.com/tomprince/buildbot-configs/blob/coq/steps.py#L5
which allows checking for the existence of a file on the slave in a
doStepIf (not that I'd necessarily suggest using that particular code.

Given that both can potentially take time to evalute, I decided to run
them in parallel.

  Tom