[PyQt] "Cannot unlock an unlocked lock"

[Phil Thompson]

On Tue, 1 Jul 2008 21:25:55 +0200, "Matthieu Brucher"
<matthieu.brucher at gmail.com> wrote:
> Hello,
> 
> I'm trying to use a lock on a thread, and I use the following code :
> 
>     try:
>       self.lock.lockForWrite()
>       self.currentScreen = 1 if self.currentScreen == 0 else 0
>     finally:
>       self.lock.unlock()
> 
> The problem is that the finally close crashes with the following
> assertion error:
> 
> ASSERT failure in QReadWriteLock::unlock(): "Cannot unlock an unlocked
> lock", file thread/qreadwritelock.cpp, line 346
> 
> This is with Ubuntu, PyQt 4.4.3-2.
> With Fedora 8, PyQt 4.3.3, the assertion does not failed.
> 
> Any idea ?

Not without a complete example that demonstrates the problem.

Phil