Incompatibility with failure-detail plugin

[fredericsureau]

Hello there, thanks for sharing your plugin!

It seems that there is an incompatibility with the built-in plugin failure-detail.

Here is the trace I get:

$ nosetests --with-process-isolation --failure-detail
E
======================================================================
ERROR: test.test
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/nose/case.py", line 133, in run
    self.runTest(result)
  File "/usr/lib/python2.7/dist-packages/nose/case.py", line 151, in runTest
    test(result)
  File "/usr/local/lib/python2.7/dist-packages/nosepipe.py", line 188, in __call__
    getattr(result, method_name)(self._test, exc_info)
  File "/usr/lib/python2.7/dist-packages/nose/proxy.py", line 143, in addFailure
    formatted = plugins.formatFailure(self.test, err)
  File "/usr/lib/python2.7/dist-packages/nose/plugins/manager.py", line 99, in __call__
    return self.call(*arg, **kw)
  File "/usr/lib/python2.7/dist-packages/nose/plugins/manager.py", line 141, in chain
    result = meth(*arg, **kw)
  File "/usr/lib/python2.7/dist-packages/nose/plugins/failuredetail.py", line 45, in formatFailure
    tbinfo = force_unicode(inspect_traceback(tb))
  File "/usr/lib/python2.7/dist-packages/nose/inspector.py", line 30, in inspect_traceback
    lines, exc_line = tbsource(tb)
  File "/usr/lib/python2.7/dist-packages/nose/inspector.py", line 87, in tbsource
    lines, dummy = inspect.findsource(frame)
  File "/usr/lib/python2.7/inspect.py", line 526, in findsource
    file = getfile(object)
  File "/usr/lib/python2.7/inspect.py", line 420, in getfile
    'function, traceback, frame, or code object'.format(object))
TypeError: <nosepipe.Frame object at 0x7f4eb6ea9210> is not a module, class, method, function, traceback, frame, or code object

----------------------------------------------------------------------
Ran 1 test in 0.127s

FAILED (errors=1)

The problem is due to the use of fake Frame object. I don't understand why you use such fake traceback objects since they seem to be simple proxy to their standard lib equivalent.