coverage using django 1.4 with pydb on

[nedbat]

Originally reported by Anonymous

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I'm getting a crash when running coverage with django 1.4 under eclipse, i.e. under the debugger. At issue seems to be this line:
collectory.py:256: traces0 = getattr(tracer0, 'traces', None)

In my case, there appears to be no traces, so traces0 is None, but then we try to iterate over it in the next section:
(261): for args in traces0:

Seems the getattr should be getattr(tracer0, 'traces', []), instead of None.

However, it's also entirely possible that running under pydb is not supported.

Thoughts?

P.S.
File "/Library/Python/2.7/site-packages/coverage-3.5.3-py2.7-macosx-10.8-intel.egg/coverage/control.py", line 383, in start
self.collector.start()
File "/Library/Python/2.7/site-packages/coverage-3.5.3-py2.7-macosx-10.8-intel.egg/coverage/collector.py", line 261, in start
for args in traces0:
TypeError: 'NoneType' object is not iterable

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• Bitbucket: https://bitbucket.org/ned/coveragepy/issue/201

[nedbat]

Hmm, i don't know pydb, and it's likely that you can't debug with coverage running anyway, since both want to use trace functions. But, you are right, the default of [] seems correct, and None seems bad.

Fixed in <<changeset 2d00e627d48d (bb)>>.