This bug was filed from the Socorro interface and is report bp-a5fab450-7c4d-4497-bf1a-e6fd62161230. ============================================================= I hit this crash when I pressed Ctrl+Shift+1 after the profiler had been running for some time. It's crashing on the main thread while destroying the ThreadProfile object of some thread. Apparently something locks an xpcom Mutex during that destructor. I can't see where that happens, though.
I can't reproduce this, on OSX 10.10.5, XCode 7.2.1, Nightly (from source), with the sampling interval set to 0.1ms, and starting/stopping the profiler a lot. Do you have any further details?
I haven't seen this since, so I think it has to do with the thread name filter that I had set at the time. If you change your thread name filter to "GeckoMain,Compositor,_,Stream", the crash might be easier to reproduce. I haven't tried though.
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