Uncaught Exception: TypeError: null is not an object (evaluating 'thi…

…s.treeOutline.isXMLMimeType')

https://bugs.webkit.org/show_bug.cgi?id=178745

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2017-10-24
Reviewed by Brian Burg.

* UserInterface/Views/DOMTreeUpdater.js:
(WI.DOMTreeUpdater.prototype._updateModifiedNodes):
An earlier tree element update might have caused this other tree element's
waiting to be updated to actually be removed. So just skip past them.

Canonical link: https://commits.webkit.org/194923@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@223927 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebInspectorUI/ChangeLog

@@ -1,3 +1,15 @@
+2017-10-24  Joseph Pecoraro  <pecoraro@apple.com>
+
+        Uncaught Exception: TypeError: null is not an object (evaluating 'this.treeOutline.isXMLMimeType')
+        https://bugs.webkit.org/show_bug.cgi?id=178745
+
+        Reviewed by Brian Burg.
+
+        * UserInterface/Views/DOMTreeUpdater.js:
+        (WI.DOMTreeUpdater.prototype._updateModifiedNodes):
+        An earlier tree element update might have caused this other tree element's
+        waiting to be updated to actually be removed. So just skip past them.
+
 2017-10-24  Fujii Hironori  <Hironori.Fujii@sony.com>
 
         [GTK] Web Inspector: Add Recording.svg

Source/WebInspectorUI/UserInterface/Views/DOMTreeUpdater.js

@@ -120,8 +120,10 @@ WI.DOMTreeUpdater.prototype = {
         this._recentlyDeletedNodes.forEach(markNodeParentForUpdate);
 
         for (let parentTreeElement of parentElementsToUpdate) {
-            parentTreeElement.updateTitle();
-            parentTreeElement.updateChildren();
+            if (parentTreeElement.treeOutline) {
+                parentTreeElement.updateTitle();
+                parentTreeElement.updateChildren();
+            }
         }
 
         for (let node of this._recentlyModifiedNodes.values()) {