[Webkit-unassigned] [Bug 77951] Chrome crashes when attempting to add cue to track element

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77951





--- Comment #6 from Eric Carlson <eric.carlson at apple.com>  2012-02-10 11:18:32 PST ---
(In reply to comment #5)
> > No, the issue is that the TextTrackCueList is not allocated before it is used. Allocating it when the track is created is one option, allocating it just before it is used is another.
> 
> Spec says:
> The addTextTrack(kind, label, language) method of media elements, when invoked, must run the following steps:
> .....
> .....
> 4. Create a new TextTrack object.
> 
> 5. Create a new text track corresponding to the new object,
> ....and set its text track list of cues to an empty list...
> 
> http://www.whatwg.org/specs/web-apps/current-work/#dom-media-addtexttrack
> 
> So, IMO it should set to an empty list when text track is created.

We are splitting semantic hairs here, but "and set its text track list of cues to an empty list" it seems to me that 0 is a perfectly valid "empty list". The bug is that the current code tries to *use* the nil ("empty") list.

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