Bug 196420 – Web Inspector: Uncaught Exception: null is not an object (evaluating 'this.ownerDocument.frameIdentifier')

• Component: Web Inspector
• Status: RESOLVED FIXED

[Joseph Pecoraro]

Uncaught Exception: null is not an object (evaluating 'this.ownerDocument.frameIdentifier')

Steps to Reproduce:
1. Start a timeline recording on reddit.com
2. Scroll around a bit / interact
  => Exception

-------
Inspected URL:        https://www.reddit.com/
Dispatch Source:      Protocol Event

Protocol Event:
{"method":"DOM.didFireEvent","params":{"nodeId":436,"eventName":"canplaythrough","timestamp":37.480989417003}}

Uncaught Exceptions:
 - null is not an object (evaluating 'this.ownerDocument.frameIdentifier') (at DOMNode.js:186:59)
    frameIdentifier @ DOMNode.js:186:59
    frame @ DOMNode.js:192:68
    addRecord @ TimelineRecording.js:322:49
    _addRecord @ TimelineManager.js:830:40
    _handleDOMNodeDidFireEvent @ TimelineManager.js:1247:24
    dispatch @ Object.js:165:30
    dispatchEventToListeners @ Object.js:180:21
    _addDOMEvent @ DOMNode.js:805:38
    didFireEvent @ DOMNode.js:755:26
    didFireEvent @ DOMManager.js:164:26
    didFireEvent @ DOMObserver.js:117:35
    dispatchEvent @ InspectorBackend.js:340:42
    _dispatchEvent @ Connection.js:195:32
    dispatch @ Connection.js:72:32
    dispatchMessageFromTarget @ TargetManager.js:101:35
    dispatchMessageFromTarget @ TargetObserver.js:42:51
    dispatchEvent @ InspectorBackend.js:340:42
    _dispatchEvent @ Connection.js:195:32
    dispatch @ Connection.js:72:32
    dispatch @ InspectorBackend.js:178:52
    dispatchNextQueuedMessageFromBackend @ MessageDispatcher.js:42:34

Additional Details:
    cause --> An uncaught exception was thrown while handling event: DOM.didFireEvent

[Radar WebKit Bug Importer]

<rdar://problem/49444205>

[Devin Rousso]

Created attachment 367787 [details]
Patch

This should probably have a test, but I'm going to see how the bots like it first...

[EWS Watchlist]

This patch modifies the inspector protocol. Please ensure that any frontend changes appropriately use feature checks for new protocol features.

[Joseph Pecoraro]

Comment on attachment 367787 [details]
Patch

Looks good to me too

[WebKit Commit Bot]

Comment on attachment 367787 [details]
Patch

Clearing flags on attachment: 367787

Committed r244566: <https://trac.webkit.org/changeset/244566>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.