From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BuildID: 2001112009 When minimizing a DHTML-based window, Mozilla 0.9.6 crashes with the following error: "R6025 - Pure Virtual Function Call" Reproducible: Always Steps to Reproduce: 1. Open the demonstration URL 2. Click the minimize button on one of the DHTML windows (not the browser window) Actual Results: The browser raises the following alert: Title: Microsoft Visual C++ Runtime Library. [ program path]/mozilla.exe R6025 - Pure Virtual Function Call Expected Results: Not crashed, or raised a JavaScript exception. The crash occurs in mozilla.exe. I've tried various combinations to identify the source of the crash, but haven't been able to spend much time on it yet. The following URL includes more basic examples derived from the same script as the demonstration URL. http://www.geocities.com/wranlon/htmlstore/mdiExamples.html The unobfuscated javascript is available at: http://www.geocities.com/wranlon/code/mdi.template.js Specifically, the error seems to happen when a) the gridLayout feature is enabled, and b) the DHTML windows are animated. Within the unobfuscated script, circa line 3400, is the function that handles the minimize event, and ultimately, leads to the crash (look for: CMDILayoutManager.prototype._handle_layout_events).

*** This bug has been marked as a duplicate of 107367 ***

The stack trace above is from a debug trunk build 2001-11-26. Based on this, I'm not sure this really is a dup of bug 107367. Reopening bug -

Based on stack trace attached above, reassigning to Style System for further analysis. Don't think it's JS Engine at fault here -

I'm getting the same error on *startup*, using build 2002010409 (after upgrading from one a couple of weeks older) I have tried uninstalling and reinstalling, deleting mozver.dat and registry.dat but it hasn't made any difference. Running Win2000.

ALSO on Win98se (4.10.2222), Mozilla 2002-01-13-03 Occurs in Mail-News Search Messages if there are many hits - because I "OR"d when I should've "AND"d.

Get this error also when accessing this page: http://dhtmlkitchen.com/dhtml/hover/hover.html

*** Bug 128605 has been marked as a duplicate of this bug. ***

Why is this Windows-only? These pages seem fine on Linux. I can't do much to debug this.

In a current Windows debug build (which I now have access to), I can minimize the windows in http://www.geocities.com/wranlon/reference/mdi_templates/sample_template_grid.html . Is that what I'm supposed to do to reproduce the bug? Does anyone else still see this crash?

I haven't seen this error in the RC or 1.0 builds. From my perspective as the reporter, I can no longer reproduce the crash. The following is an updated example of the same code base sans Geocities advertisements. Click the HTML INPUT button to obtain a window with a visible minimize button. If you don't see the button when the page loads, bump the browser size a few pixels (render bug?). http://www.whitefrost.com/index_mdi_test.html

Based on comment 11 and based on minimizing and doing some other things with the example page in comment 11, marking worksforme. If you see this problem in future builds, please reopen the bug.