It first showed up in 23.0a1/20130426. The regression range is: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=690b5e0f6562&tochange=a6104e0e5a2c It's likely a regression from bug 865548. Signature mozilla::dom::UnregisterPannerNodeOn More Reports Search UUID ed108550-a909-4f33-a1dc-e93292130426 Date Processed 2013-04-26 15:00:53 Uptime 44 Last Crash 1.0 minutes before submission Install Age 44 seconds since version was first installed. Install Time 2013-04-26 14:56:12 Product Firefox Version 23.0a1 Build ID 20130426030834 Release Channel nightly OS Windows NT OS Version 6.1.7601 Service Pack 1 Build Architecture x86 Build Architecture Info GenuineIntel family 6 model 37 stepping 2 Crash Reason EXCEPTION_ACCESS_VIOLATION_WRITE Crash Address 0x1e97f150 App Notes AdapterVendorID: 0x8086, AdapterDeviceID: 0x0042, AdapterSubsysID: 305917aa, AdapterDriverVersion: 8.15.10.2622 D2D? D2D+ DWrite? DWrite+ D3D10 Layers? D3D10 Layers+ Processor Notes sp-processor09.phx1.mozilla.com_11675:2012 EMCheckCompatibility True Adapter Vendor ID 0x8086 Adapter Device ID 0x0042 Total Virtual Memory 4294836224 Available Virtual Memory 3399364608 System Memory Use Percentage 47 Available Page File 5808300032 Available Physical Memory 2079956992 Frame Module Signature Source 0 xul.dll mozilla::dom::UnregisterPannerNodeOn content/media/webaudio/AudioContext.cpp:262 1 xul.dll nsTHashtable<mozilla::dom::DOMStorageManager::DOMStorageCacheHashKey>::s_EnumStu obj-firefox/dist/include/nsTHashtable.h:486 2 xul.dll PL_DHashTableEnumerate obj-firefox/xpcom/build/pldhash.cpp:714 3 xul.dll nsTHashtable<mozilla::plugins::DeletingObjectEntry>::EnumerateEntries obj-firefox/dist/include/nsTHashtable.h:237 4 xul.dll mozilla::dom::AudioContext::UpdatePannerSource content/media/webaudio/AudioContext.cpp:276 5 xul.dll mozilla::dom::AudioNode::Disconnect content/media/webaudio/AudioNode.cpp:213 6 xul.dll mozilla::dom::AudioNodeBinding::disconnect obj-firefox/dom/bindings/AudioNodeBinding.cpp:102 7 xul.dll mozilla::dom::AudioNodeBinding::genericMethod obj-firefox/dom/bindings/AudioNodeBinding.cpp:207 8 xul.dll XPCConvert::NativeData2JS js/xpconnect/src/XPCConvert.cpp:325 9 mozjs.dll EnterBaseline js/src/ion/BaselineJIT.cpp:154 10 mozjs.dll js::RunScript js/src/jsinterp.cpp:340 11 mozjs.dll js::InvokeKernel js/src/jsinterp.cpp:421 12 mozjs.dll js::Invoke js/src/jsinterp.h:134 13 mozjs.dll js_fun_apply js/src/jsfun.cpp:1031 14 @0x393f94 More reports at: https://crash-stats.mozilla.com/report/list?signature=mozilla%3A%3Adom%3A%3AUnregisterPannerNodeOn

This is probably caused by bug 865550, since we would sometimes fail to unregister an AudioBufferSourceNode properly, which could cause this kind of crash if it's accessed later on. I landed that bug on inbound yesterday, we should wait for it to make its way into a Nightly and then wait a few days to see if the crash disappears.

Bug 865550 is on the latest Nightly now.

There have been no crashes since 23.0a1/20130427.

Mass moving Web Audio bugs to the Web Audio component. Filter on duckityduck.