Changeset 11726

Timestamp:

12/26/14 16:44:40 (9 years ago)

Author:

bburlacu

Message:

#1772: Fixed a bug where the fragment root would be set to null (the Difference method returned a null value when the compared subtrees were identical).

File:

• branches/HeuristicLab.EvolutionTracking/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Tracking/SymbolicDataAnalysisExpressionAfterManipulatorOperator.cs (modified) (1 diff)

branches/HeuristicLab.EvolutionTracking/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Tracking/SymbolicDataAnalysisExpressionAfterManipulatorOperator.cs

@@ -47 +47 @@
       var parent = childVertex.Parents.First().Data;
       var subtree = child.Difference(parent);
-      int index = child.IterateNodesPrefix().TakeWhile(node => node != subtree).Count();
-      var fragment = new Fragment<ISymbolicExpressionTreeNode> { Root = subtree, Index1 = index, Index2 = index };
+      Fragment<ISymbolicExpressionTreeNode> fragment = null;
+      if (subtree != null) {
+        int index = child.IterateNodesPrefix().TakeWhile(node => node != subtree).Count();
+        fragment = new Fragment<ISymbolicExpressionTreeNode> { Root = subtree, Index1 = index, Index2 = index };
+      }
       childVertex.InArcs.Last().Data = fragment;
       return base.Apply();