Bug 55895

Summary: Destroying WorkerFileSystemCallbacksBridge on main thread results in ASSERT in WorkerContext::Observer::~Observer
Product: WebKit Reporter: Adam Klein <adamk>
Component: WebCore Misc.Assignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: abarth, eric, kinuko, levin, webkit.review.bot
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Mac   
OS: OS X 10.6   
Attachments:
Description Flags
Patch levin: review+

Description Adam Klein 2011-03-07 12:27:23 PST 
Kinuko is still trying to track down where this is happening, but it seems to be triggerable by running fast/filesystem/workers/file-from-file-entry-sync.html.  See Chromium try job failure:

http://build.chromium.org/p/tryserver.chromium/builders/mac/builds/15549/steps/ui_tests/logs/WorkerFileSystemFileFromFileEntrySyncTest

So far, only triggered on Mac, but no reason to think this is platform-specific.
Comment 1 Adam Klein 2011-03-07 15:00:16 PST 
This doesn't seem to be specific to the file-from-file-entry-sync test.  Here's the same failure in another test:

http://build.chromium.org/p/tryserver.chromium/builders/mac/builds/16102/steps/ui_tests/logs/FileWriterSyncTruncateExtend
Comment 2 Kinuko Yasuda 2011-03-08 17:47:15 PST 
Created attachment 85118 [details]
Patch
Comment 3 David Levin 2011-03-08 17:54:42 PST 
Comment on attachment 85118 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=85118&action=review

> Source/WebKit/chromium/ChangeLog:11
> +        (this could happen before or after the runTaskOnWorkerThread) do

s/do/does/
Comment 4 Kinuko Yasuda 2011-03-08 19:15:39 PST 
Committed r80617: <http://trac.webkit.org/changeset/80617>
Comment 5 WebKit Review Bot 2011-03-10 02:28:53 PST 
http://trac.webkit.org/changeset/80617 might have broken GTK Linux 32-bit Debug