Bug 201716 – Uncaught Exception: TypeError: null is not an object (evaluating 'selectedTreeElement.representedObject')

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

[Joseph Pecoraro]

Uncaught Exception: TypeError: null is not an object (evaluating 'selectedTreeElement.representedObject')

* STEPS TO REPRODUCE
1. Inspect any page
2. Set a breakpoint by clicking in the gutter
3. Delete the breakpoint by dragging it off the gutter
  => Exception

* NOTES
- The Breakpoint Tree Outline doesn't have any selected tree element and the breakpoint is getting removed.

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Uncaught Exceptions:
 - TypeError: null is not an object (evaluating 'selectedTreeElement.representedObject') (at SourcesNavigationSidebarPanel.js:1763:36)
    _handleBreakpointElementAddedOrRemoved @ SourcesNavigationSidebarPanel.js:1763:36
    dispatch @ Object.js:165:30
    dispatchEventToListeners @ Object.js:172:17
    removeChildAtIndex @ TreeOutline.js:392:49
    removeChild @ TreeOutline.js:406:32
    _removeDebuggerTreeElement @ SourcesNavigationSidebarPanel.js:1209:38
    _removeBreakpoint @ SourcesNavigationSidebarPanel.js:1148:40
    _handleDebuggerBreakpointRemoved @ SourcesNavigationSidebarPanel.js:1985:31
    dispatch @ Object.js:165:30
    dispatchEventToListeners @ Object.js:172:17
    removeBreakpoint @ DebuggerManager.js:636:38
    textEditorBreakpointRemoved @ SourceCodeTextEditor.js:1329:44
    _documentMouseUp @ TextEditor.js:1598:63
    _documentMouseUp @ [native code]
-------

[Radar WebKit Bug Importer]

<rdar://problem/55292615>

[Joseph Pecoraro]

Created attachment 378627 [details]
[PATCH] Proposed Fix

[Devin Rousso]

Comment on attachment 378627 [details]
[PATCH] Proposed Fix

r=me, good catch!

[WebKit Commit Bot]

Comment on attachment 378627 [details]
[PATCH] Proposed Fix

Clearing flags on attachment: 378627

Committed r249800: <https://trac.webkit.org/changeset/249800>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.