[Webkit-unassigned] [Bug 23049] New: [jsfunfuzz] With blocks do not correctly protect their scope object
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue Dec 30 21:23:13 PST 2008
https://bugs.webkit.org/show_bug.cgi?id=23049
Summary: [jsfunfuzz] With blocks do not correctly protect their
scope object
Product: WebKit
Version: 528+ (Nightly build)
Platform: Macintosh
OS/Version: Mac OS X 10.5
Status: NEW
Severity: Normal
Priority: P1
Component: JavaScriptCore
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: oliver at apple.com
OtherBugsDependingO 13638
nThis:
JSFunFuzz found this
with(1){gc();a;}
Which crashes as the scope object (1->toObject()) is not protected by the
registerfile as is expected. Looking into this i also found that we would not
correctly protect the scope when local variables are usedfor scope, as in:
var z; with(z={}){z=null; {}; {}; [1,2,3,4*{}]; gc(); b}
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