Merge pull request #487 from abarth/fix_menu_crash

Popup menu in Stocks throws exception

packages/flutter/lib/src/material/drawer.dart

@@ -62,7 +62,8 @@ class _DrawerRoute extends OverlayRoute {
   _DrawerState _state = _DrawerState.showing;
 
   Widget _build(BuildContext context) {
-    return new _DrawerController(
+    return new RepaintBoundary(
+      child: new _DrawerController(
         key: _drawerKey,
         settleDuration: _kBaseSettleDuration,
         onClosed: () {
@@ -81,6 +82,7 @@ class _DrawerRoute extends OverlayRoute {
           }
         },
         child: new _Drawer(route: this)
+      )
     );
   }
 
@@ -202,7 +204,7 @@ class _DrawerControllerState extends State<_DrawerController> {
               widthFactor: _performance.progress,
               child: new SizeObserver(
                 onSizeChanged: _handleSizeChanged,
-                child: new ForcedLayer(
+                child: new RepaintBoundary(
                   child: config.child
                 )
               )

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

@@ -1061,7 +1061,7 @@ class RenderPointerListener extends RenderProxyBox {
 /// previously. Similarly, when the child repaints but the surround tree does
 /// not, we can re-record its display list without re-recording the display list
 /// for the surround tree.
-class RenderForcedLayer extends RenderProxyBox {
+class RenderRepaintBoundary extends RenderProxyBox {
   bool get hasLayer => true;
 }
 

packages/flutter/lib/src/widgets/basic.dart

@@ -1337,9 +1337,9 @@ class Listener extends OneChildRenderObjectWidget {
   }
 }
 
-class ForcedLayer extends OneChildRenderObjectWidget {
-  ForcedLayer({ Key key, Widget child }) : super(key: key, child: child);
-  RenderForcedLayer createRenderObject() => new RenderForcedLayer();
+class RepaintBoundary extends OneChildRenderObjectWidget {
+  RepaintBoundary({ Key key, Widget child }) : super(key: key, child: child);
+  RenderRepaintBoundary createRenderObject() => new RenderRepaintBoundary();
 }
 
 class IgnorePointer extends OneChildRenderObjectWidget {

packages/flutter/lib/src/widgets/routes.dart

@@ -39,9 +39,7 @@ abstract class OverlayRoute extends Route {
 
   void didPush(OverlayState overlay, OverlayEntry insertionPoint) {
     for (WidgetBuilder builder in builders) {
-      _overlayEntries.add(new OverlayEntry(builder: (BuildContext context) {
-        return new ForcedLayer(child: builder(context));
-      }));
+      _overlayEntries.add(new OverlayEntry(builder: builder));
       overlay?.insert(_overlayEntries.last, above: insertionPoint);
       insertionPoint = _overlayEntries.last;
     }
@@ -170,6 +168,7 @@ class _ModalScope extends StatusTransitionComponent {
         )
       );
     }
+    contents = new RepaintBoundary(child: contents);
     ModalPosition position = route.position;
     if (position == null)
       return contents;