Bug 204473 – Web Inspector: Uncaught Exception: TypeError: undefined is not an object (evaluating 'target.PageAgent.getCompositingBordersVisible')

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Inspector

[Devin Rousso]

Uncaught Exception in Web Inspector.

Steps to Reproduce:
1. inspect any page
2. go to the Layers Tab
3. close Web Inspector
4. open Web Inspector

Uncaught Exceptions:
-----------------------
 - TypeError: undefined is not an object (evaluating 'target.PageAgent.getCompositingBordersVisible') (at Layers3DContentView.js:426:25)
    _updateCompositingBordersButtonState @ Layers3DContentView.js:426:25
    shown @ Layers3DContentView.js:83:50
    prepareToShow @ BackForwardEntry.js:84:35
    _showEntry @ ContentViewContainer.js:456:28
    showBackForwardEntryForIndex @ ContentViewContainer.js:166:28
    showContentView @ ContentViewContainer.js:142:42
    shown @ LayersTabContentView.js:73:44
    prepareToShow @ BackForwardEntry.js:84:35
    _showEntry @ ContentViewContainer.js:456:28
    showBackForwardEntryForIndex @ ContentViewContainer.js:166:28
    showContentView @ ContentViewContainer.js:142:42
    _tabBarItemSelected @ TabBrowser.js:240:55
    dispatch @ Object.js:165:30
    dispatchEventToListeners @ Object.js:172:17
    selectedTabBarItem @ LegacyTabBar.js:387:38
    ? @ Main.js:510:14
-----------------------

Notes:
Inspected URL:        (unknown)
Loading completed:    false
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko)

[Devin Rousso]

Created attachment 384090 [details]
Patch

[Blaze Burg]

Comment on attachment 384090 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=384090&action=review

r=me

> Source/WebInspectorUI/UserInterface/Controllers/TargetManager.js:261
> +        WI._backendTargetAvailablePromise.resolve();

This reads nice now.

> Source/WebInspectorUI/UserInterface/Controllers/TargetManager.js:273
> +        WI._pageTargetAvailablePromise.resolve();

Ditto :)

[WebKit Commit Bot]

Comment on attachment 384090 [details]
Patch

Clearing flags on attachment: 384090

Committed r252814: <https://trac.webkit.org/changeset/252814>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/57444627>