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

[Tahoe-LAFS]

#2366: set up buildslave to find deprecation warnings
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     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 daira):

 An alternative approach that enables `DeprecationWarning`s unconditionally
 in tests is at https://github.com/tahoe-lafs/tahoe-lafs/commits/2312
 .enable-deprecation-warnings-for-tests.0 .

 I tried to enable `DeprecationWarning`s only for `allmydata.*` by using
 `PYTHONWARNINGS=default::DeprecationWarning:allmydata.*`, but that didn't
 work (it didn't correctly match submodules).

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2366#comment:6>
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