https://bugzilla.wikimedia.org/show_bug.cgi?id=40463

       Web browser: ---
             Bug #: 40463
           Summary: Uncaught TypeError: Cannot call method
                    'canHaveChildren' of null
           Product: VisualEditor
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: User Interface
        AssignedTo: [email protected]
        ReportedBy: [email protected]
                CC: [email protected], [email protected],
                    [email protected]
    Classification: Unclassified
   Mobile Platform: ---


Little hard to reproduce but has come up several times. Selecting some text,
playing around with the inspector and pasting some text.

Stack:

Uncaught TypeError: Cannot call method 'canHaveChildren' of null
> ve.dm.Document.getNodeFromOffset
> ve.ui.Toolbar.updateTools
> ve.EventEmitter.emit
> ve.dm.Surface.change
> ve.ce.Surface.onPaste
> jQuery.extend.proxy.proxy
> jQuery.event.dispatch
> jQuery.event.add.elemData.handle.eventHandle


ve.dm.Document.prototype.getNodeFromOffset = function(offset) {
        var node = this.documentNode.getNodeFromOffset(offset);
        if (!node.canHaveChildren
Uncaught TypeError: Cannot call method 'canHaveChildren' of null
        ()) {
            node = node.getParent();
        }
        r

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