User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0 (Beta/Release) Build ID: 20140131161412 Steps to reproduce: Go on the WebGL globe at http://www.chromeexperiments.com/detail/webgl-globe/ Move the globe around a bit Close the browser by clicking on the 'X' button at the top of the window Actual results: ###!!! ASSERTION: Uh, IsInModalState() called w/o a reachable top window? Expected results: The browser should of exited sucessfully

added correct url http://workshop.chromeexperiments.com/globe-search/

Can't repro on Nightly 2014-02-03-mozilla-central-debug, win 7 x64

Still occurs for me with same str

I can't reproduce this having only 1 tab with the above URL opened. But I can reproduce the assertion by just closing FF with 2 empty tabs opened. Could you please check again?

It happens to me on both of those occasions that you mentioned hope this helps

Bobby, is there any chance this is related to https://hg.mozilla.org/mozilla-central/rev/72bc1aebb5d0? I'm seeing the same assertion failure but with completely different steps to reproduce; I've figured out (roughly) why I'm seeing it, so I wanted to record it here in case it helps... I was trying to track down the cause of bug 920978, and running that single test on my debug trunk build with the attached additional NSPR logging showed the following sequence: Test opens about:addons tab (event loop spins) Test opens modal doorhanger on about:addons tab (event loop spins, lots of test activity) Test cancels modal doorhanger ...nsGlobalWindow.LeaveModalState() creates an nsPendingTimeoutRunner and schedules it on the event loop Test closes about:addons tab (event loop spins) nsPendingTimeoutRunner.Run() is invoked, and it tries to access the now closed about:addons tab Modifying my test to let the event loop spin once between cancelling the modal doorhanger and closing the tab makes the assertion go away. Here's a slightly edited log of my test output with the assertion failure: ... (close modal dialog here) 0:31.64 2114982272[10065b070]: LeaveModalState 1272d2c00 (topwin 1272d2c00) depth 0 0:31.64 2114982272[10065b070]: nsPendingTimeoutRunner 1130fb840 created for window 1272d2c00 ... (next lines are where we close about:addons) 0:31.68 TEST-PASS | chrome://mochitests/content/browser/toolkit/mozapps/extensions/test/browser/browser_dragdrop.js | Should have an add-ons manager window to close 0:31.68 TEST-PASS | chrome://mochitests/content/browser/toolkit/mozapps/extensions/test/browser/browser_dragdrop.js | Should be closing window with correct URI ... 0:31.87 2114982272[10065b070]: nsPendingTimeoutRunner 1130fb840 running 0:31.87 [47461] ###!!! ASSERTION: Uh, IsInModalState() called w/o a reachable top window?: 'Error', file /Users/ireid/tbird/mozilla-central-PB/dom/base/nsGlobalWindow.cpp, line 8417 0:31.89 nsGlobalWindow::IsInModalState()+0x0000004C [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x02501C3C] 0:31.89 nsGlobalWindow::RunTimeout(nsTimeout*)+0x00000026 [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x025029B6] 0:31.90 nsGlobalWindow::RunPendingTimeoutsRecursive(nsGlobalWindow*, nsGlobalWindow*)+0x00000061 [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x025026E1] 0:31.90 nsPendingTimeoutRunner::Run()+0x00000071 [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x025432E1] 0:31.90 nsThread::ProcessNextEvent(bool, bool*)+0x00000619 [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x00134139] 0:31.91 NS_ProcessPendingEvents(nsIThread*, unsigned int)+0x000000AB [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x000357BB] 0:31.91 nsBaseAppShell::NativeEventCallback()+0x000000C9 [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x02280459] 0:31.91 nsAppShell::ProcessGeckoEvents(void*)+0x000001AC [/Users/ireid/tbird/obj/mozilla-central-PB/dist/NightlyDebug.app/Contents/MacOS/XUL +0x0220C17C]

(In reply to :Irving Reid from comment #6) > Created attachment 8385870 [details] [diff] [review] > Additional NSPR logging in nsGlobalWindow > > Bobby, is there any chance this is related to > https://hg.mozilla.org/mozilla-central/rev/72bc1aebb5d0? I doubt it. I think this assertion is just bogus. GetScriptableTop can return null (via GetParent returning null once the window has been disconnected from the docshell). We should just remove it.

https://bugzilla.mozilla.org/show_bug.cgi?id=1472046 Move all DOM bugs that haven’t been updated in more than 3 years and has no one currently assigned to P5. If you have questions, please contact :mdaly.