Fatal Python error: PyThreadState_Get: no current thread with extension module

[Mike C. Fletcher]

I'm trying to compile a new extension module (based on mx.TextTools), 
and I'm discovering that the programme gets a Fatal Python error after 
completing a test suite (likely during cleanup of the various modules). 
  I'm trying to figure out what the error really means, and in which 
crack I should put my finger to stop the dike from bursting.  Is there a 
guide/guidelines/helpful-elf-who-sneaks-into-the-shop-at-night for 
debugging this kind of error anywhere?

S:\sp\simpleparse\tests>mx_flag.py
......
----------------------------------------------------------------------
Ran 6 tests in 0.000s

OK
Fatal Python error: PyThreadState_Get: no current thread

abnormal program termination

Help appreciated,
Mike
_______________________________________
   Mike C. Fletcher
   http://members.rogers.com/mcfletch/