[Webkit-unassigned] [Bug 81488] New: Empty beforeload event listener makes web process crash when visting this web page

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81488

           Summary: Empty beforeload event listener makes web process
                    crash when visting this web page
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://www.zennioptical.com/
        OS/Version: Mac OS X 10.7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: marc.hoyois at gmail.com


Created an attachment (id=132538)
 --> (https://bugs.webkit.org/attachment.cgi?id=132538&action=review)
Minimal extension that causes the crash

Overview:

The presence of any beforeload event listener makes Safari's web process crash when visting http://www.zennioptical.com/.

Steps to reproduce:
!! WEB PROCESS WILL CRASH AND ALL TABS WILL RELOAD WHEN YOU DO THIS !!

1. Install the attached minimal extension, which has the following injected script:

function handleBeforeLoadEvent(event) {}
document.addEventListener("beforeload", handleBeforeLoadEvent, true);

(This will also work with any of the standard extensions that use beforeload, obviously.)

2. Visit http://www.zennioptical.com/.
3. Wait a few seconds and observe the crash!

Build date & platform: tested with Safari 5.2 and nightly build 7535.18.5, 536+. Happens in Safari 5.1.4 as well.

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