leehaut opened a new pull request, #7754:
URL: https://github.com/apache/hop/pull/7754

   Fix https://github.com/apache/hop/issues/7753
   
   
   ## Summary
   
   - Fix intermittent `ArrayIndexOutOfBoundsException` in Hop GUI when a 
position undo is recorded with an empty selection after a slight transform 
drag/`mouseUp`.
   - Guard `ChangeAction` undo setters against null/empty or length-mismatched 
inputs; skip rejected (`None`) undo entries in `AbstractMeta.addUndo`.
   - Align `HopGuiPipelineGraph.mouseUp` empty-selection check with the 
existing note/workflow paths, and add unit coverage for empty/mismatched 
position undo.


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