abarth feedback

packages/flutter/lib/rendering/flex.dart

@@ -439,7 +439,20 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
 
   void paint(PaintingCanvas canvas, Offset offset) {
     if (_overflow > 0) {
-      assert(() {
+      canvas.save();
+      canvas.clipRect(offset & size);
+      defaultPaint(canvas, offset);
+      canvas.restore();
+    } else {
+      defaultPaint(canvas, offset);
+    }
+  }
+
+  void debugPaintSize(PaintingCanvas canvas, Offset offset) {
+    super.debugPaintSize(canvas, offset);
+    if (_overflow <= 0)
+      return;
+
     // Draw a red rectangle over the overflow area in debug mode
     // You should be using a Clip if you want to clip your children
     Paint paint = new Paint()..color = const Color(0x7FFF0000);
@@ -455,14 +468,5 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
         break;
     }
     canvas.drawRect(overflowRect, paint);
-        return true;
-      });
-      canvas.save();
-      canvas.clipRect(offset & size);
-      defaultPaint(canvas, offset);
-      canvas.restore();
-    } else {
-      defaultPaint(canvas, offset);
-    }
   }
 }