[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2366: set up buildslave to find deprecation warnings

[Tahoe-LAFS]

#2366: set up buildslave to find deprecation warnings
-------------------------+-------------------------------------------------
     Reporter:  warner   |      Owner:
         Type:  task     |     Status:  new
     Priority:  normal   |  Milestone:  eventually
    Component:  dev-     |    Version:  1.10.0
  infrastructure         |   Keywords:  DeprecationWarning tests buildbot
   Resolution:           |  travis-ci
Launchpad Bug:           |
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Comment (by warner):

 it looks like that patch only changes three test pathways (`make
 quicktest`, `make test-coverage`, and `setup.py trial`), but not the one
 that travis uses (`bin/tahoe debug trial`), which is why travis is passing
 even though a local `make quicktest` would probably fail.

 I love the idea of enabling the warnings only for our own code.. I'd be ok
 with that going in unconditionally. Let's see if there's a way to make the
 submodules work, and try to turn them on in the test-running commands,
 instead of changing the buildbot to scan/categorize everything.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2366#comment:7>
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