Bug#512565: totem-xine: Segmentation fault when disabling visual effects

[Josselin Mouette]

reassign 512565 libxine1 1.1.14-4
thanks

Le jeudi 22 janvier 2009 à 19:26 +0000, Laurentiu Pancescu a écrit :
> I can also reproduce the hang by clicking the visual effects checkbox
> while audio is paused (it happens at the first click, going from disabled
> to enabled, unlike the segmentation fault).  After it hung, I stopped it
> with Ctrl-C in gdb and generated another stack trace for the hang (attached).
> 
> I assumed it's the same bug as the crash, but the stack trace looks
> somewhat different. Should I file another bug for the hang?

This is indeed a different bug (race condition vs. deadlock), but the
root cause is the same: xine-lib doesn’t seem to support correctly
enabling or disabling visual effects at runtime.

In the crash issue, it is trying to access a resource that has been
freed, presumably from another thread. In the deadlock issue, it is
waiting for a mutex that will never be released since it has been freed
in the meantime. (The very idea of freeing a mutex that may be used at
any time is, well, “interesting”.)

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