Fix copypasta in RenderSizedOverflowBox.

packages/flutter/lib/src/rendering/object.dart

@@ -751,6 +751,8 @@ abstract class RenderObject extends AbstractNode implements HitTestTarget {
             debugPrint('a manner consistent with the constraints provided, and, in addition, that');
             debugPrint('the getMinIntrinsicWidth(), getMaxIntrinsicWidth(), etc, functions all');
             debugPrint('return consistent values within the same constraints.');
+            debugPrint('If you are not writing your own RenderObject subclass, then this is not');
+            debugPrint('your fault. Contact support: https://github.com/flutter/flutter/issues/new');
           }
           return true;
         });

packages/flutter/lib/src/rendering/overflow.dart

@@ -40,12 +40,12 @@ class RenderSizedOverflowBox extends RenderBox with RenderObjectWithChildMixin<R
 
   double getMinIntrinsicHeight(BoxConstraints constraints) {
     assert(constraints.isNormalized);
-    return constraints.constrainWidth(_requestedSize.height);
+    return constraints.constrainHeight(_requestedSize.height);
   }
 
   double getMaxIntrinsicHeight(BoxConstraints constraints) {
     assert(constraints.isNormalized);
-    return constraints.constrainWidth(_requestedSize.height);
+    return constraints.constrainHeight(_requestedSize.height);
   }
 
   double computeDistanceToActualBaseline(TextBaseline baseline) {