https://tbpl.mozilla.org/php/getParsedLog.php?id=19707506&tree=Mozilla-Inbound Rev4 MacOSX Snow Leopard 10.6 mozilla-inbound debug test mochitest-browser-chrome on 2013-02-13 11:01:23 PST for push 985508c04c80 slave: talos-r4-snow-029 WARNING: NS_ENSURE_TRUE(mMutable) failed: file ../../../../netwerk/base/src/nsSimpleURI.cpp, line 265 TEST-INFO | chrome://mochitests/content/browser/browser/components/tabview/test/browser_tabview_expander.js | Console message: [JavaScript Warning: "ReferenceError: reference to undefined property this.borderTrenches" {file: "chrome://browser/content/tabview.js" line: 1522}] ++DOMWINDOW == 431 (0x17feab7b8) [serial = 7588] [outer = 0x16a78fe18] TEST-INFO | chrome://mochitests/content/browser/browser/components/tabview/test/browser_tabview_expander.js | Console message: [JavaScript Error: "The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol." {file: "http://example.com/#0" line: 0}] WARNING: NS_ENSURE_TRUE(mMutable) failed: file ../../../../netwerk/base/src/nsSimpleURI.cpp, line 265 ++DOMWINDOW == 432 (0x177570608) [serial = 7589] [outer = 0x16e653358] TEST-INFO | chrome://mochitests/content/browser/browser/components/tabview/test/browser_tabview_expander.js | Console message: [JavaScript Error: "The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol." {file: "http://example.com/#1" line: 0}] WARNING: NS_ENSURE_TRUE(mMutable) failed: file ../../../../netwerk/base/src/nsSimpleURI.cpp, line 265 ++DOMWINDOW == 433 (0x1725802a8) [serial = 7590] [outer = 0x173e59218] Assertion failure: thing->isAligned(), at ../../../js/src/gc/Marking.cpp:128 TEST-UNEXPECTED-FAIL | chrome://mochitests/content/browser/browser/components/tabview/test/browser_tabview_expander.js | Exited with code 1 during test run INFO | automation.py | Application ran for: 0:27:50.394441 INFO | automation.py | Reading PID log: /var/folders/Hs/HsDn6a9SG8idoIya6p9mtE+++TI/-Tmp-/tmprL2Mctpidlog PROCESS-CRASH | chrome://mochitests/content/browser/browser/components/tabview/test/browser_tabview_expander.js | application crashed [@ MarkInternal<js::Shape>] Crash dump filename: /var/folders/Hs/HsDn6a9SG8idoIya6p9mtE+++TI/-Tmp-/tmp7MrvD0/minidumps/AB0DA6DA-E288-442E-A8F2-A19054D99794.dmp Operating system: Mac OS X 10.6.8 10K549 CPU: amd64 family 6 model 23 stepping 10 2 CPUs Crash reason: EXC_BAD_ACCESS / KERN_INVALID_ADDRESS Crash address: 0x0 Thread 0 (crashed) 0 XUL!MarkInternal<js::Shape> [Marking.cpp:985508c04c80 : 160 + 0x0] rbx = 0x00007fff70e2a2f8 r12 = 0x000000017a814000 r13 = 0x00000001066fd000 r14 = 0x000000017a8148e8 r15 = 0x00007fff5fbfd0d8 rip = 0x0000000103cc7e5b rsp = 0x00007fff5fbfced0 rbp = 0x00007fff5fbfcf20 Found by: given as instruction pointer in context 1 XUL!nsPlainTextSerializer::DoOpenContainer(nsIAtom*)::bulletCharArray + 0x5e14d rip = 0x000000010404402f rsp = 0x00007fff5fbfcf20 rbp = 0x00007fff5fbfcf20 Found by: stack scanning 2 XUL!JSScript::markChildren(JSTracer*) [jsscript.cpp:985508c04c80 : 252 + 0x11] rip = 0x0000000103b7b9fd rsp = 0x00007fff5fbfcf30 rbp = 0x00007fff5fbfcf70 Found by: stack scanning 3 XUL!js::TraceChildren(JSTracer*, void*, JSGCTraceKind) [Marking.cpp:985508c04c80 : 959 + 0xa] rip = 0x0000000103ccbc35 rsp = 0x00007fff5fbfcf80 rbp = 0x00007fff5fbfcfb0 Found by: stack scanning 4 XUL!IncrementalCollectSlice [jsgc.cpp:985508c04c80 : 2662 + 0xa] rip = 0x0000000103aba373 rsp = 0x00007fff5fbfcfc0 rbp = 0x00007fff5fbfd150 Found by: stack scanning 5 libSystem.B.dylib + 0x4989 rip = 0x00007fff8736898a rsp = 0x00007fff5fbfd080 rbp = 0x00007fff5fbfd150 Found by: stack scanning 6 libplds4.dylib!PL_CompareStrings [plhash.c : 476 + 0x4] rip = 0x00000001000d02c9 rsp = 0x00007fff5fbfd090

So this happened on getting-diagnostics talos-r4-snow-029, three times on being-decommissioned talos-r4-snow-056, and on known-PPoD-failer talos-r4-lion-039? Looks like this is a good bug to remind us that when we see this failure, we should blame the slave.