Bug 71264 - ASSERT(!m_inBeforeLoadEventHandler) triggered when forcing a layout in a beforeload listener.
Summary: ASSERT(!m_inBeforeLoadEventHandler) triggered when forcing a layout in a befo...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: DOM (show other bugs)
Version: 528+ (Nightly build)
Hardware: All All
: P2 Major
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2011-10-31 21:48 PDT by Andy Estes
Modified: 2013-04-09 04:30 PDT (History)
2 users (show)

See Also:

Attachments
Test case (170 bytes, text/html)
2011-10-31 21:48 PDT, Andy Estes 		no flags Details
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Description Andy Estes 2011-10-31 21:48:28 PDT 
Created attachment 113125 [details]
Test case

Since HTMLObjectElement::updateWidget() is called during layout, we can do certain things in a beforeload listener that would trigger a reentrant layout and hence a re-entrant call to HTMLObjectElement::updateWidget(). A simple case would be calling event.target.offsetWidth in the listener for an object's beforeload event. See the attached test case. While this triggers an assertion in debug builds, it has no release symptom that I'm aware of.
Comment 1 Andy Estes 2011-10-31 21:48:51 PDT 
<rdar://problem/9319618>