Bug 65213 – Web Inspector: [Chromium] REGRESSION: Uncaught TypeError: Cannot read property 'isTracingToWindowObjects' of undefined

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Inspector (Deprecated)

[Mikhail Naganov]

From http://code.google.com/p/chromium/issues/detail?id=90518


Chrome Version       : 14.0.825.0
OS Version: Windows 7
URLs (if applicable) : devtools
Other browsers tested: -

What steps will reproduce the problem?
1. Go to chrome://extensions/
2. Click an extensions background page (I used AdBlock)
3. Click the tab 'audits'
4. Select 'reload page and audit on load' and press Run
5. Wait a few seconds
6. Right mouse click the devtools -> inspect element
7. Notice Uncaught TypeError: Cannot read property 'isTracingToWindowObjects' of undefined in DevTools.js line 46465
"if (this.snapshotView.isTracingToWindowObjects)"

What is the expected result?
No errors

What happens instead?
JS error

Please provide any additional information below. Attach a screenshot if possible.
The audits test never finishes...

UserAgentString: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.825.0 Safari/535.1

[Mikhail Naganov]

Can't repro. See the original bug description.

[Pavel Feldman]

I can see a clear possibility of this happening:

WebInspector.HeapSnapshotRetainingPathsList.prototype.setDataSource has a guard preventing snapshotView from being assigned:

if (this._nodeIndex === nodeIndex)
            return;

subsequent refresh call will hit the problem described.

[Mikhail Naganov]

Yes, it can be reproduced by changing the current value of the "Paths from the selected object" with no heap object previously selected.

[Mikhail Naganov]

Created attachment 102109 [details]
patch

[WebKit Review Bot]

Comment on attachment 102109 [details]
patch

Attachment 102109 [details] did not pass chromium-ews (chromium-xvfb):
Output: http://queues.webkit.org/results/9249743

New failing tests:
fast/canvas/webgl/framebuffer-test.html

[Mikhail Naganov]

Manually committed http://trac.webkit.org/changeset/91829

        Web Inspector: [Chromium] REGRESSION: Uncaught TypeError: Cannot read property 'isTracingToWindowObjects' of undefined
        https://bugs.webkit.org/show_bug.cgi?id=65213

        Reviewed by Pavel Feldman.

        * inspector/front-end/DetailedHeapshotView.js:
        (WebInspector.HeapSnapshotRetainingPathsList.prototype.refresh):