modules/graphics/src/main/java/javafx/scene/Parent.java

*** 1051,1066 ****
--- 1051,1079 ----
          return super.getBaselineOffset();
      }
  
      /**
       * Executes a top-down layout pass on the scene graph under this parent.
+      * 
+      * Calling this method while the Parent is doing layout is a no-op.
       */
      public final void layout() {
          switch(layoutFlag) {
              case CLEAN:
                  break;
              case NEEDS_LAYOUT:
+                 if (performingLayout) {
+                     /* This code is here mainly to avoid infinite loops as layout() is public and the call might be (indirectly) invoked accidentally
+                        while doing the layout.
+                        One example might be an invocation from Group layout bounds recalculation
+                         (e.g. during the localToScene/localToParent calculation).
+                        The layout bounds will thus return layout bounds that are "old" (i.e. before the layout changes, that are just being done), 
+                        which is likely what the code would expect.
+                        The changes will invalidate the layout bounds again however, so the layout bounds query after layout pass will return correct answer.
+                     */
+                     break; 
+                 }
                  performingLayout = true;
                  layoutChildren();
                  // Intended fall-through
              case DIRTY_BRANCH:
                  for (int i = 0, max = children.size(); i < max; i++) {