Re: [Pyobjc-dev] experiences using pyobjc+pychecker?

[Ronald O. <ous...@ci...>]

On 19 nov 2003, at 22:42, Bob Ippolito wrote:

> On Nov 19, 2003, at 4:11 PM, David Eppstein wrote:
>
>> Hi, is anyone else using pychecker and pyobjc together successfully?
>> I just did several things at once: upgrade to 10.3 (and the 
>> command-line
>> python that comes with it); upgrade to yesterday's cvs version of
>> PyObjC, and start trying the new pychecker that was just announced
>> yesterday.  When I try pychecker on a very short PyObjC source file, I
>> get a bus error:
>>
>> Hyperbolic% pychecker unicmp.py
>> Processing unicmp...
>> /usr/local/bin/pychecker: line 3:  4306 Bus error
>
> pychecker probably tries to delete some ObjC-code-containing extension 
> modules from sys.modules, which causes Bad Things To Happen if their 
> ref count goes to 0 and python tries to unload the bundle.  pydoc can 
> quite easily cause this problem.  Try doing the following at the top 
> of your module:

That's not necessary, it was a genuine PyObjC bug :-(

Unloading of ObjC-code-containing extension modules will also cause a 
crash, but that's a different issue. Do you know where and how python 
unloads dynamicly loaded modules, the dynload_*.c files don't seem to 
define functions for unloading a module? I'd like to have a sugestion 
about how to fix the problem before filing a bug on this at python's 
bugtracker (a simple testcase would also be nice, but that is easy 
enough).

Ronald