Bug 48561 – Assertion failure in DocumentLoader::commitData when loading a media document in WebKit2

• Component: Page Loading
• Status: RESOLVED FIXED

[Adam Roben (:aroben)]

This is the WebKit2 equivalent of bug 48531.


To reproduce:

1. Go to http://www.nch.com.au/acm/sample.wav in a debug build

You'll hit an assertion in DocumentLoader::commitData:

    ASSERT(m_frame->document()->parsing());

The wav file seems to load fine in Release builds.

Here's the backtrace:

>	WebKit.dll!WebCore::DocumentLoader::commitData(const char * bytes=0x0524f010, int length=67868)  Line 306 + 0x35 bytes	C++
 	WebKit.dll!WebKit::WebFrameLoaderClient::committedLoad(WebCore::DocumentLoader * loader=0x020d95b8, const char * data=0x0524f010, int length=67868)  Line 681	C++
 	WebKit.dll!WebCore::DocumentLoader::commitLoad(const char * data=0x0524f010, int length=67868)  Line 292 + 0x29 bytes	C++
 	WebKit.dll!WebCore::DocumentLoader::receivedData(const char * data=0x0524f010, int length=67868)  Line 320	C++
 	WebKit.dll!WebCore::MainResourceLoader::addData(const char * data=0x0524f010, int length=67868, bool allAtOnce=false)  Line 157	C++
 	WebKit.dll!WebCore::ResourceLoader::didReceiveData(const char * data=0x0524f010, int length=67868, __int64 lengthReceived=67868, bool allAtOnce=false)  Line 262 + 0x1b bytes	C++
 	WebKit.dll!WebCore::MainResourceLoader::didReceiveData(const char * data=0x0524f010, int length=67868, __int64 lengthReceived=67868, bool allAtOnce=false)  Line 437	C++
 	WebKit.dll!WebCore::ResourceLoader::didReceiveData(WebCore::ResourceHandle * __formal=0x02052460, const char * data=0x0524f010, int length=67868, int lengthReceived=67868)  Line 415 + 0x1f bytes	C++
 	WebKit.dll!WebCore::didReceiveData(_CFURLConnection * conn=0x020e2d88, const __CFData * data=0x0523d348, long originalLength=67868, const void * clientInfo=0x02052460)  Line 214 + 0x2a bytes	C++
 	CFNetwork.dll!URLConnectionClient::_clientDidReceiveData()

Note that on Mac you'll instead hit a crash (bug 48559), but if that crash didn't happen this would.

[Adam Roben (:aroben)]

<rdar://problem/8606679>

[Adam Roben (:aroben)]

Created attachment 72516 [details]
Cancel main resource loads after we hand them off to the media engine

[WebKit Review Bot]

Attachment 72516 [details] did not pass style-queue:

Failed to run "['WebKitTools/Scripts/check-webkit-style']" exit_code: 1
WebKit2/WebProcess/WebCoreSupport/mac/WebErrorsMac.mm:174:  Line contains tab character.  [whitespace/tab] [5]
Total errors found: 1 in 6 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Eric Carlson]

Comment on attachment 72516 [details]
Cancel main resource loads after we hand them off to the media engine

View in context: https://bugs.webkit.org/attachment.cgi?id=72516&action=review

> WebKit2/WebProcess/WebCoreSupport/qt/WebErrorsQt.cpp:93
> +ResourceError pluginWillHandleLoadError(const ResourceResponse&)
> +{
> +    notImplemented();
> +    return ResourceError();
> +}

Might be worth filing a bug about this.

[Adam Roben (:aroben)]

Comment on attachment 72516 [details]
Cancel main resource loads after we hand them off to the media engine

View in context: https://bugs.webkit.org/attachment.cgi?id=72516&action=review

>> WebKit2/WebProcess/WebCoreSupport/qt/WebErrorsQt.cpp:93
>> +}
> 
> Might be worth filing a bug about this.

Filed bug 48764.

[Adam Roben (:aroben)]

Committed r71033: <http://trac.webkit.org/changeset/71033>