I worked with ARC and Xcode Version 5.1.1 (5B1008), With the tool of Instruments leak, i just found there's a leak after GPUImageVideoCamera's released.



But I don't know why the frameRenderingSemaphore is leaked.
In my opinion, frameRenderingSemaphore is under control of ARC, after GPUImageVideoCamera's dealloc method been called. the frameRenderingSemaphore should be released safety.
Is there anybody could finger it out? Thanks.