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Chris Muller uploaded a new version of ToolBuilder-Morphic to project The Trunk: http://source.squeak.org/trunk/ToolBuilder-Morphic-cmm.114.mcz
==================== Summary ====================
Name: ToolBuilder-Morphic-cmm.114 Author: cmm Time: 1 April 2015, 3:05:39.686 pm UUID: 734dc0ce-3ffa-429c-a740-12d57659e296 Ancestors: ToolBuilder-Morphic-cmm.113
No, you cannot send copyFrom: 0 to: 0 to an empty Array. Must check for emptiness.
=============== Diff against ToolBuilder-Morphic-cmm.113 ===============
Item was changed: ----- Method: PluggableTreeMorph>>visibleItems (in category 'geometry') ----- visibleItems + ^ self items ifNotEmpty: + [ : items | items + copyFrom: self topVisibleRowIndex + to: self bottomVisibleRowIndex ]! - ^ self items - copyFrom: self topVisibleRowIndex - to: self bottomVisibleRowIndex!
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