Fix error with isolated Black

Fix error message with isolated black
Bram-Hub · Jun 23, 2023 · 4a2b67f · 4a2b67f
1 parent 03103a7
commit 4a2b67f
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/src/main/java/edu/rpi/legup/history/ValidateContradictionRuleCommand.java b/src/main/java/edu/rpi/legup/history/ValidateContradictionRuleCommand.java
@@ -86,9 +86,17 @@ public void executeCommand() {
         }
         else {
             TreeTransitionView transitionView = (TreeTransitionView) firstSelectedView;
-            finalTreeElement = transitionView.getChildView().getTreeElement();
+            if (transitionView.getChildView() != null) {
+                finalTreeElement = transitionView.getChildView().getTreeElement();
+            }
+            else {
+                finalTreeElement = null;
+            }
+        }
+
+        if (finalTreeElement != null) {
+            puzzle.notifyBoardListeners(listener -> listener.onTreeElementChanged(finalTreeElement));
         }
-        puzzle.notifyBoardListeners(listener -> listener.onTreeElementChanged(finalTreeElement));
         puzzle.notifyTreeListeners(listener -> listener.onTreeSelectionChanged(newSelection));
     }