[Pythonmac-SIG] modulegraph bug

[Russell E. Owen]

modulegraph 0.7.2.dev_r21-py2.5 has the following bug (which may be in 
other versions as well) which causes this error:
Traceback (most recent call last):
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-pac
kages/py2app-0.4.2-py2.5.egg/py2app/build_app.py", line 579, in _run
    self.run_normal()
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-pac
kages/py2app-0.4.2-py2.5.egg/py2app/build_app.py", line 631, in 
run_normal
    mf = self.get_modulefinder()
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-pac
kages/py2app-0.4.2-py2.5.egg/py2app/build_app.py", line 539, in 
get_modulefinder
    debug=debug,
  File "build/bdist.macosx-10.3-i386/egg/modulegraph/find_modules.py", 
line 255, in find_modules
    find_needed_modules(mf, scripts, includes, packages)
  File "build/bdist.macosx-10.3-i386/egg/modulegraph/find_modules.py", 
line 190, in find_needed_modules
    path = m.packagepath[0]
TypeError: 'NoneType' object is unsubscriptable

in modulegraph.py find_needed_modules at line 189:
        if m is not None:
            path = m.packagepath[0]

in this case m is not None, but m.packagepath is None, which causes the 
crash. I don't know if the bug is that m.packagepath is None, or that 
this is not being properly handled.

What triggered this bug was that a required package was missing. (I had 
unzipped my matplotlib egg, but forgot to add a .pth file).

-- Russell