[Webkit-unassigned] [Bug 51780] New: video tag: crashes on random seek and reload of video

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=51780

           Summary: video tag: crashes on random seek and reload of video
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zhukov.alex at gmail.com


Created an attachment (id=77723)
 --> (https://bugs.webkit.org/attachment.cgi?id=77723&action=review)
html+script to reproduce the bug

Overview:
WebKit (both nightly build r74228 and Safari 5.0.3) crashes when reloading and/or seeking within video.

Steps to Reproduce:
attached reloadvideo.html html+script reproduces the crash after five 1-5 minutes of reloading.
1. find long enough (large enough) video (the longer the duration the faster bug reproduces) (i test on apple IOS training videos (e.g. 1-09 Fundamentals of Cocoa Session from WWDC.m4v 336MB)
2. make sure your http server support Content-Range headers
3. make sure it takes notable time to download movie into the browser (i use uranged bandwidth limited http server http://code.google.com/p/uranged/)
4. open reloadvideo.html, you may want to edit it first to change video url to your video
4.1 click "Random Reload" 
4.2 click "Random Seek"
5. wait up to 5 minutes
6. crash

Actual Results:
After restarting crashed browser functionality does not restore completely. Seek to the middle of the movie is not supported. 
User-Agent string changes from "Apple Mac OS X v10.6.5 CoreMedia v1.0.0.10H574" to "QuickTime/7.6.6 (qtver=7.6.6;cpu=IA32;os=Mac 10.6.5)"

Expected Results:
No crash
Full functionality restored after restarting the application.

Build Date & Platform: WebKit r74228 Mac OS X 10.6.5

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