[Webkit-unassigned] [Bug 86733] Setting array index -1 and looping over array causes bad behavior

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=86733





--- Comment #10 from Filip Pizlo <fpizlo at apple.com>  2012-05-17 17:53:24 PST ---
(In reply to comment #8)
> My guess is incorrect reification in an OSR exit, based purely on the symptoms

Nope, OSR is fine.  It's the slow path C function that the DFG calls for out-of-bounds indices.  It assumes that the value is non-negative even though the whole point of the function is to handle both negative and too-large positive indices.

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