Container#moveBefore/moveAfter moves child to incorrect index when moving up (5.1.0)

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   Container#moveBefore/moveAfter moves child to incorrect index when moving up (5.1.0)

   
   

   
   

   Container#moveBefore/moveAfter moves child to incorrect index when moving up (5.1.0)

   
   
   
   

   
   

   Bug in Ext.container.Container#moveBefore and #moveAfter: when moving a child with a lower index to a child with a higher index withing the same container, the child gets placed one position too high.
   

   Example:

   
   

   
   
   • 1, 2, 3 => move 1 before 3 => should be 2, 1, 3 but is 2, 3, 1
   
   
   • 1, 2, 3 => move 1 after 2 => should be 2, 1, 3 but is 2, 3, 1
   
   

   
   Fiddle: http://ift.tt/15X8mQH
   
   See Fiddle example for further details, reproduction steps and expected/actual result.
   

   Additional info:

   
   

   Ext version tested:

   
   

   
   
   • Ext 5.0.1.1255 (works)
   
   
   • Ext JS 5.1.0.107 (fails)
   
   

   
   Browser versions tested against:
   

   
   
   • Chrome 40.0.2214.93 m
   
   
   • FF 34.0.5
   
   

   
   

   
   

   
   

   
   

   
   

   
   
   
   

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Container#moveBefore/moveAfter moves child to incorrect index when moving up (5.1.0)