Comment 18 for bug 901498

For instance, running with -n:
Starting poppy-sftp.
0 <bound method FileLogObserver.emit of <twisted.python.log.FileLogObserver instance at 0xb347c8c>>
INFO:/tmp/poppy-access.log:---- Server started ----
^CINFO:/tmp/poppy-access.log:---- Server stopped ----
INFO:poppy-sftp.Hooks:Post-processing finished

This shows setStdOut gets 0, so doesn't override the stdout, stderr channels.

Without -n setStdOut still gets 0.

The setup happens from 'AppLogger.start()'

(Pdb) self._observerFactory
(Pdb) application.getComponent(ILogObserver, None)

so both the proscribed ways of getting a custom observer are failing.