Call stack for this is:
ve.ce.BranchNode.prototype.onSplice [Line: 9324, Col: 25], load.php
oo.EventEmitter.prototype.emit [Line: 18274, Col: 31], load.php
ve.dm.BranchNode.prototype.splice [Line: 3876, Col: 9], load.php
Anonymous function [Line: 1551, Col: 21], load.php
ve.dm.Document.prototype.rebuildNodes [Line: 6568, Col: 9], load.php
ve.dm.DocumentSynchronizer.synchronizers.rebuild [Line: 6840, Col: 9], load.php
ve.dm.DocumentSynchronizer.prototype.synchronize [Line: 6873, Col: 17], load.php
ve.dm.TransactionProcessor.prototype.process [Line: 4456, Col: 9], load.php
ve.dm.Document.prototype.commit [Line: 6313, Col: 9], load.php
ve.dm.Surface.prototype.changeInternal [Line: 5570, Col: 21], load.php
ve.dm.Surface.prototype.change [Line: 5541, Col: 9], load.php
ve.ce.Surface.prototype.changeModel [Line: 11255, Col: 13], load.php
ve.ce.Surface.prototype.onContentChange [Line: 10791, Col: 21], load.php
oo.EventEmitter.prototype.emit [Line: 18274, Col: 31], load.php
ve.ce.SurfaceObserver.prototype.pollOnceInternal [Line: 11377, Col: 25], load.php
ve.ce.SurfaceObserver.prototype.pollOnce [Line: 11309, Col: 9], load.php
ve.ce.SurfaceObserver.prototype.timerLoop [Line: 11295, Col: 13], load.php
proxy [Line: 260, Col: 17], load.php
ve.ce.SurfaceObserver.prototype.setTimeout [Line: 11392, Col: 9], load.php
ve.ce.SurfaceObserver.prototype.timerLoop [Line: 11298, Col: 13], load.php
proxy [Line: 260, Col: 17], load.php
ve.ce.SurfaceObserver.prototype.setTimeout [Line: 11392, Col: 9], load.php
ve.ce.SurfaceObserver.prototype.timerLoop [Line: 11298, Col: 13], load.php
proxy [Line: 260, Col: 17], load.php
ve.ce.SurfaceObserver.prototype.setTimeout [Line: 11392, Col: 9], load.php
ve.ce.SurfaceObserver.prototype.timerLoop [Line: 11298, Col: 13], load.php
ve.ce.SurfaceObserver.prototype.startTimerLoop [Line: 11287, Col: 9], load.php
ve.ce.Surface.prototype.onDocumentKeyDown [Line: 10406, Col: 9], load.php
proxy [Line: 260, Col: 17], load.php
ve.EventSequencer.prototype.callListener [Line: 2690, Col: 9], load.php
ve.EventSequencer.prototype.onEvent [Line: 2609, Col: 13], load.php
Anonymous function [Line: 2526, Col: 17], load.php
jQuery.event.dispatch [Line: 2383, Col: 25], load.php
elemData.handle [Line: 2202, Col: 21], load.php