trial dumps on frame error

[gardnerpomper]

I run the attached code and I get this stack dump:

===============================================================================
[ERROR]: sip_test.sipTest.testRegister

Traceback (most recent call last):
  File "/usr/bin/trial", line 24, in ?
    run()
  File "/usr/lib/python2.3/site-packages/twisted/scripts/trial.py", line 345, in run
    test_result = trialRunner.run(suite)
  File "/usr/lib/python2.3/site-packages/twisted/trial/runner.py", line 798, in run
    result.printErrors()
  File "/usr/lib/python2.3/site-packages/twisted/trial/reporter.py", line 297, in printErrors
    self._formatFailureTraceback)
  File "/usr/lib/python2.3/site-packages/twisted/trial/reporter.py", line 275, in _printResults
    self.write(formatter(*(content[1:])))
  File "/usr/lib/python2.3/site-packages/twisted/trial/reporter.py", line 265, in _formatFailureTraceback
    fail.frames, frames = self._trimFrames(fail.frames), fail.frames
  File "/usr/lib/python2.3/site-packages/twisted/trial/reporter.py", line 255, in _trimFrames
    last = newFrames[-1]
IndexError: list index out of range

[gardnerpomper]

very very simple sip unit test

[exarkun]

Looks like a duplicate of #1901 - testRegister in the attachment isn't defined to take self.