https://tbpl.mozilla.org/php/getParsedLog.php?id=35807031&tree=Mozilla-Inbound slave: talos-r4-snow-063 11:53:25 INFO - native frame :: <unknown filename> :: <TOP_LEVEL> :: line 0" {file: "resource://gre/components/nsLivemarkService.js" line: 405 column: 0 source: "405"}] 11:53:25 INFO - TEST-INFO | chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js | Console message: [JavaScript Error: "A promise chain failed to handle a rejection. 11:53:25 INFO - Date: Fri Mar 07 2014 11:53:17 GMT-0800 (PST) 11:53:25 INFO - Full Message: 11:53:25 INFO - Full Stack: JS frame :: resource://gre/components/nsLivemarkService.js :: LS_getLivemark/< :: line 405 11:53:25 INFO - native frame :: <unknown filename> :: <TOP_LEVEL> :: line 0" {file: "resource://gre/components/nsLivemarkService.js" line: 405 column: 0 source: "405"}] 11:53:25 INFO - TEST-PASS | chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js | The window title for about:privatebrowsing detached tab is correct (outside private browsing mode) 11:53:25 INFO - TEST-INFO | chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js | Console message: OpenGL compositor Initialized Succesfully. 11:53:25 INFO - Version: 2.1 NVIDIA-1.6.36 11:53:25 INFO - Vendor: NVIDIA Corporation 11:53:25 INFO - Renderer: NVIDIA GeForce 320M OpenGL Engine 11:53:25 INFO - FBO Texture Target: TEXTURE_2D 11:53:26 WARNING - TEST-UNEXPECTED-FAIL | chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js | application terminated with exit code 1 11:53:26 INFO - INFO | runtests.py | Application ran for: 0:07:27.164844 11:53:26 INFO - INFO | zombiecheck | Reading PID log: /var/folders/rL/rLmLIk3UHRyK+NNBoWtcck+++-k/-Tmp-/tmpziZpVupidlog 11:53:26 INFO - mozcrash INFO | Downloading symbols from: https://ftp-ssl.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-inbound-macosx64/1394217686/firefox-30.0a1.en-US.mac.crashreporter-symbols.zip 11:53:53 WARNING - PROCESS-CRASH | chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js | application crashed [@ ReleaseSliceNow(unsigned int, void*)] 11:53:53 INFO - Crash dump filename: /var/folders/rL/rLmLIk3UHRyK+NNBoWtcck+++-k/-Tmp-/tmpodzMk9/minidumps/CB945EBC-4E48-4099-91DD-6C296A21A34E.dmp 11:53:53 INFO - Operating system: Mac OS X 11:53:53 INFO - 10.6.8 10K549 11:53:53 INFO - CPU: amd64 11:53:53 INFO - family 6 model 23 stepping 10 11:53:53 INFO - 2 CPUs 11:53:53 INFO - Crash reason: EXC_BAD_ACCESS / 0x0000000d 11:53:53 INFO - Crash address: 0x0 11:53:53 INFO - Thread 0 (crashed) 11:53:53 INFO - 0 XUL!ReleaseSliceNow(unsigned int, void*) [CycleCollectedJSRuntime.cpp:d1c54bc2bb71 : 994 + 0x0] 11:53:53 INFO - rbx = 0x5a5a5a5a5a5a5a5a r12 = 0x000000000002aff0 11:53:53 INFO - r13 = 0x00000000ffffaa01 r14 = 0x000000011fe70e58 11:53:53 INFO - r15 = 0x00000000000055fe rip = 0x000000010102a51f 11:53:53 INFO - rsp = 0x00007fff5fbfd090 rbp = 0x00007fff5fbfd0c0 11:53:53 INFO - Found by: given as instruction pointer in context 11:53:53 INFO - 1 XUL!mozilla::IncrementalFinalizeRunnable::ReleaseNow(bool) [CycleCollectedJSRuntime.cpp:d1c54bc2bb71 : 1056 + 0x17] 11:53:53 INFO - rbx = 0x000000011fe70e40 r12 = 0x000000011fe70e78 11:53:53 INFO - r13 = 0x0000000000989680 r14 = 0x000000011fe70e70 11:53:53 INFO - r15 = 0x00007fff5fbfd207 rip = 0x000000010102a83c 11:53:53 INFO - rsp = 0x00007fff5fbfd0d0 rbp = 0x00007fff5fbfd110 11:53:53 INFO - Found by: call frame info 11:53:53 INFO - 2 XUL!mozilla::IncrementalFinalizeRunnable::Run() [CycleCollectedJSRuntime.cpp:d1c54bc2bb71 : 1089 + 0xc] 11:53:53 INFO - rbx = 0x000000011fe70e40 r12 = 0x0000000100343748 11:53:53 INFO - r13 = 0x00007fff5fbfd201 r14 = 0x000000010033c558 11:53:53 INFO - r15 = 0x00007fff5fbfd207 rip = 0x000000010102a986 11:53:53 INFO - rsp = 0x00007fff5fbfd120 rbp = 0x00007fff5fbfd130 11:53:53 INFO - Found by: call frame info

If it helps, here's the full text of that particular test.

I guess the array of things to release contains a null pointer? That's odd.

I'm on Aurora 30.0a2 (2014-04-09) and over the last couple of days, my CPU usage has been insane and it's crashed atleast thrice.

Inactive; closing (see bug 1180138).