Bringing up the compose window throws up an assertion and crashes. Build and platform: Mozilla debug build from 6 PM today on Win NT. ###!!! ASSERTION: You can't dereference a NULL nsCOMPtr with operator->().: 'mRawPtr != 0', file D:/mozilla/xpcom/base/nsCOMPtr.h, line 649 Stack trace: nsBindingManager::WalkRules(nsBindingManager * const 0x05d72dd4, nsIStyleSet * 0x052befb0, int (nsISupports *, void *)* 0x018cbb00 SheetHasStatefulStyle(nsISupports *, void *), void * 0x0012eca8, nsIContent * 0x0604bcb8) line 805 + 38 bytes StyleSetImpl::WalkRuleProcessors(int (nsISupports *, void *)* 0x018cbb00 SheetHasStatefulStyle(nsISupports *, void *), void * 0x0012eca8, nsIContent * 0x0604bcb8) line 2012 StyleSetImpl::HasStateDependentStyle(StyleSetImpl * const 0x052befb0, nsIPresContext * 0x05299150, nsIContent * 0x0604bcb8) line 1109 nsCSSFrameConstructor::ContentStatesChanged(nsCSSFrameConstructor * const 0x052beef0, nsIPresContext * 0x05299150, nsIContent * 0x0604bcb8, nsIContent * 0x0603c38c) line 9776 + 26 bytes StyleSetImpl::ContentStatesChanged(StyleSetImpl * const 0x052befb0, nsIPresContext * 0x05299150, nsIContent * 0x0604bcb8, nsIContent * 0x0603c38c) line 1183 PresShell::ContentStatesChanged(PresShell * const 0x052be438, nsIDocument * 0x05c2f450, nsIContent * 0x0604bcb8, nsIContent * 0x0603c38c) line 3594 + 49 bytes nsXULDocument::ContentStatesChanged(nsXULDocument * const 0x05c2f450, nsIContent * 0x0604bcb8, nsIContent * 0x0603c38c) line 1604 nsEventStateManager::SetContentState(nsEventStateManager * const 0x05ef8d48, nsIContent * 0x060a6398, int 4) line 2578 nsEventStateManager::GenerateMouseEnterExit(nsIPresContext * 0x05299150, nsGUIEvent * 0x0012f894) line 1523 nsEventStateManager::PreHandleEvent(nsEventStateManager * const 0x05ef8d48, nsIPresContext * 0x05299150, nsEvent * 0x0012f894, nsIFrame * 0x037b2bd8, nsEventStatus * 0x0012f784, nsIView * 0x060c1640) line 306 PresShell::HandleEventInternal(nsEvent * 0x0012f894, nsIView * 0x060c1640, unsigned int 1, nsEventStatus * 0x0012f784) line 4225 + 43 bytes PresShell::HandleEvent(PresShell * const 0x052be434, nsIView * 0x060c1640, nsGUIEvent * 0x0012f894, nsEventStatus * 0x0012f784, int 0, int & 1) line 4166 + 25 bytes nsView::HandleEvent(nsView * const 0x060c1640, nsGUIEvent * 0x0012f894, unsigned int 8, nsEventStatus * 0x0012f784, int 0, int & 1) line 379 nsView::HandleEvent(nsView * const 0x060c42c0, nsGUIEvent * 0x0012f894, unsigned int 8, nsEventStatus * 0x0012f784, int 0, int & 1) line 352 nsView::HandleEvent(nsView * const 0x060bd270, nsGUIEvent * 0x0012f894, unsigned int 8, nsEventStatus * 0x0012f784, int 0, int & 1) line 352 nsView::HandleEvent(nsView * const 0x060bdd20, nsGUIEvent * 0x0012f894, unsigned int 8, nsEventStatus * 0x0012f784, int 0, int & 1) line 352 nsView::HandleEvent(nsView * const 0x052ba9a0, nsGUIEvent * 0x0012f894, unsigned int 28, nsEventStatus * 0x0012f784, int 1, int & 1) line 352 nsViewManager2::DispatchEvent(nsViewManager2 * const 0x052bd370, nsGUIEvent * 0x0012f894, nsEventStatus * 0x0012f784) line 1429 HandleEvent(nsGUIEvent * 0x0012f894) line 68 nsWindow::DispatchEvent(nsWindow * const 0x060bc834, nsGUIEvent * 0x0012f894, nsEventStatus & nsEventStatus_eIgnore) line 614 + 10 bytes nsWindow::DispatchWindowEvent(nsGUIEvent * 0x0012f894) line 635 nsWindow::DispatchMouseEvent(unsigned int 300, nsPoint * 0x00000000) line 3811 + 21 bytes ChildWindow::DispatchMouseEvent(unsigned int 300, nsPoint * 0x00000000) line 4021 nsWindow::ProcessMessage(unsigned int 512, unsigned int 0, long 524437, long * 0x0012fc10) line 2870 + 24 bytes nsWindow::WindowProc(HWND__ * 0x039405ee, unsigned int 512, unsigned int 0, long 524437) line 883 + 27 bytes USER32! 77e71820()

adding nsbeta3, smoketest keywords.

adding timeless to the cc list...

Do we have many occurances of this or is it isolated?

I can reproduce this everytime, using mozilla debug build from 6 PM yesterday. I will check today's release builds and update asap.

I see this on today's commercial release builds on Linux(2000-09-20-08-M18) and windows(2000-09-20-06-M18). It crashes if I launch the compose window second time. First launch is OK. Unable to launch today's Mac build. I sent a talkback report, but got an error msg while trying to bring up http://cyclone :( Upgrading severity to blocker.

This looks like a dup of 53219.

*** This bug has been marked as a duplicate of 53219 ***

verified as dupe.