Happens every few days, but I don't see anything obvious that triggers it. Crash reports: https://crash-stats.mozilla.com/report/index/6f5088a1-7a6f-463b-90b0-ac49b2140713 https://crash-stats.mozilla.com/report/index/bf1242c7-334d-4575-8b63-262aa2140709 https://crash-stats.mozilla.com/report/index/5339137c-b8b7-4c12-b2b7-849b02140708 https://crash-stats.mozilla.com/report/index/159cee44-8f21-4431-9ea9-e91092140622

Looks like we are trying to scan a TypeObject that's a null pointer.

I've also ran into this today while leaving fx opened for several hours on OSX 10.9.4 and returned to the crash reporter screen. Here's my report in case it adds more context on this crash: - bp-c26d9089-39dc-428b-9f0a-40fd32140806

I ran into this a couple of minutes ago with 33 while I was simply scrolling in a Bugzilla entry. https://crash-stats.mozilla.com/report/index/063ab222-d96b-4215-bd21-03ccf2141013

Reproduced using Firefox 34 beta 8 while pinning and unpinning tiles on New Tab Page.

Ran into this without clear STR, Fx was running in the background (unfocused) with a just a few pages loaded including Bugzilla (and a lot unloaded tabs). https://crash-stats.mozilla.com/report/index/6908d305-f731-4ddf-bbc2-9ed122141123

throwing my "ditto" here: https://crash-stats.mozilla.com/report/index/52c99068-ed08-41db-83bf-7d6382150117

related to bug 1077386? (In reply to Corey Shields [:cshields] from comment #6) > throwing my "ditto" here: > > https://crash-stats.mozilla.com/report/index/52c99068-ed08-41db-83bf- > 7d6382150117 0 XUL js::GCMarker::processMarkStackOther(unsigned long, unsigned long) js/src/jsinfer.h 1 XUL js::GCMarker::drainMarkStack(js::SliceBudget&) js/src/gc/Marking.cpp 2 XUL js::gc::GCRuntime::incrementalCollectSlice(long long, JS::gcreason::Reason) js/src/jsgc.cpp 3 XUL js::gc::GCRuntime::gcCycle(bool, long long, js::JSGCInvocationKind, JS::gcreason::Reason) js/src/jsgc.cpp 4 XUL js::gc::GCRuntime::collect(bool, long long, js::JSGCInvocationKind, JS::gcreason::Reason) js/src/jsgc.cpp 5 XUL js::gc::GCRuntime::notifyDidPaint() js/src/jsgc.cpp 6 XUL nsXPConnect::NotifyDidPaint() js/xpconnect/src/nsXPConnect.cpp 7 XUL nsRefreshDriver::Tick(long long, mozilla::TimeStamp) layout/base/nsRefreshDriver.cpp