Closed Bug 398265 Opened 14 years ago Closed 14 years ago
Crash [@ ns
Print Preview Listener::Remove Listeners()] with <frame> on print preview
See testcase, when doing print preview on that testcase, I crash with current trunk build after clicking away the "An unknown error occured while printing" dialogs. This seems to have regressed between 2007-07-01 and 2007-07-02: http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=all&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2007-07-01+03&maxdate=2007-07-02+06&cvsroot=%2Fcvsroot I have no idea what might have caused this. http://crash-stats.mozilla.com/report/index/9640c868-70e5-11dc-bcee-001a4bd43ed6 0 nsPrintPreviewListener::RemoveListeners() mozilla/layout/printing/nsPrintPreviewListener.cpp:100 1 nsPrintData::~nsPrintData() mozilla/layout/printing/nsPrintData.cpp:96 2 nsPrintEngine::CommonPrint(int, nsIPrintSettings*, nsIWebProgressListener*) mozilla/layout/printing/nsPrintEngine.cpp:429 3 nsPrintEngine::PrintPreview(nsIPrintSettings*, nsIDOMWindow*, nsIWebProgressListener*) mozilla/layout/printing/nsPrintEngine.cpp:720 4 DocumentViewerImpl::PrintPreview(nsIPrintSettings*, nsIDOMWindow*, nsIWebProgressListener*) mozilla/layout/base/nsDocumentViewer.cpp:3513 5 NS_InvokeByIndex_P mozilla/xpcom/reflect/xptcall/src/md/win32/xptcinvoke.cpp:101 6 AutoJSSuspendRequest::SuspendRequest() mozilla/js/src/xpconnect/src/xpcprivate.h:3318 7 RtlpAllocateFromHeapLookaside
Flags: blocking1.9? → blocking1.9+
This will fix the crash from happening. We still end up with an "Unknown print error"
Where is the mPrintEngine being dropped? If it's because the nsDocumentViewer is going away, then we have more serious problems that could make us crash in other ways...
I can investigate this.
Assignee: nobody → Olli.Pettay
I think we want this. The problem is that we're cleaning up things twice. One crash goes like this: DocumentReadyForPrinting() fails, so FinishPrintPreview() calls CleanupOnFailure, which fires nsPrintCompletionEvent/nsRunnable. Then before the event is handled, DoCommonPrint returns to CommonPrint which open notices the error and opens a dialog. Events get processed, and so nsPrintCompletionEvent calls mDocViewerPrint->OnDonePrinting(), which deletes the printengine. So next time printengine is used, it is a deleted object. The patch changes things so that FinishPrintPreview() doesn't call CleanupOnFailure. It is up to caller to handle clean-up. FinishPrintPreview() is called 3 times. One is the case here, where we don't want CleanupOnFailure() to be called, one is in ::Observe(), which I'm changing in the patch and one is in nsDocumentViewerImpl::Destroy, where printengine is anyway destroyed, so doesn't make much sense to clean-up (and possibly show a dialog). Not sure, but this might be actually a regression from Bug 370966.
Comment on attachment 288040 [details] [diff] [review] proposed patch Document that callers to FinishPrintPreview are expected to clean up.
Status: NEW → RESOLVED
Closed: 14 years ago
Resolution: --- → FIXED
verified fixed using Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b2pre) Gecko/2007112905 Minefield/3.0b2pre. I don't crash, but I still get the unknown print error on Win XP.
Status: RESOLVED → VERIFIED
I filed bug 468843 for the unknown print error thing.
Crash Signature: [@ nsPrintPreviewListener::RemoveListeners()]
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