Bug 58151

Summary: Crash after closing a Webview, in WebKit!WebCore::WindowMessageBroadcaster::SubclassedWndProc
Product: WebKit Reporter: Alice Liu <alice.barraclough>
Component: WebKit2Assignee: Alice Liu <alice.barraclough>
Severity: Normal CC: webkit.review.bot
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: PC   
OS: Windows Vista   
Description Flags
patch with correct changelog aroben: review+

Description Alice Liu 2011-04-08 12:04:55 PDT
On windows, after closing a WebKit2 WebView we can crash in WebKit!WebCore::WindowMessageBroadcaster::SubclassedWndProc.  This is happening because when WebKit2 WebViews close, we aren't removing that webview from the list of WindowMessageBroadcaster listeners.  

Comment 1 Alice Liu 2011-04-08 12:07:25 PDT
Created attachment 88855 [details]
Comment 2 WebKit Review Bot 2011-04-08 12:08:14 PDT
Attachment 88855 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebKit2/ChangeLog', u'Source/WebKit..." exit_code: 1

Source/WebKit2/ChangeLog:1:  ChangeLog entry has no bug number  [changelog/bugnumber] [5]
Total errors found: 1 in 2 files

If any of these errors are false positives, please file a bug against check-webkit-style.
Comment 3 Alice Liu 2011-04-08 12:11:45 PDT
Created attachment 88856 [details]
patch with correct changelog
Comment 4 Adam Roben (:aroben) 2011-04-08 12:55:12 PDT
Comment on attachment 88856 [details]
patch with correct changelog

Is it possible to make a test for this using TestWebKitAPI? If you know the sequence of events that lead to the crash it should be pretty easy to simulate them in TestWebKitAPI.
Comment 5 Alice Liu 2011-04-08 16:50:25 PDT
(In reply to comment #4)
I'm unsure if it's possible.  The crash wasn't always reproducible even with the application-specific webview that it was happening with. And my guess is that it's not guaranteed that we'll be able to replicate the situational prerequisites for the crash with TestWebKitAPI, especially if i don't know what they are at the moment.
Comment 6 Alice Liu 2011-04-08 16:51:41 PDT