Deadlock on hangup when the current call is on hold

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What steps will reproduce the problem?
1. Make outgoing call. 
2. Remote set the call on hold
3. Hangup the call

What is the expected output? What do you see instead?
The call should be hangup. Instead the app block.
The problem don't occur each time but occasionally.

What version of the product or source code revision are you using? On what
operating system?
iOs, version of code 2.0

Please provide any additional information below.

In IOSProxyVideoProducer.mm, function "stopVideoCapture", If I replace the line 
[self performSelectorOnMainThread:@selector(stopPreview) withObject:nil 
waitUntilDone:YES];
with 
[self performSelectorOnMainThread:@selector(stopPreview) withObject:nil 
waitUntilDone:NO];

and in the function "startVideoCapture" :
[self performSelectorOnMainThread:@selector(startPreview) withObject:nil 
waitUntilDone:YES];
with
[self performSelectorOnMainThread:@selector(startPreview) withObject:nil 
waitUntilDone:NO];

the problem never happen.

Regards

Original issue reported on code.google.com by robat...@gmail.com on 11 Jan 2012 at 9:29

Gangeshwar / idoubs

Deadlock on hangup when the current call is on hold #94