Merge pull request #2946 from benmoss/nested-render-warning

Add displayName to nested render warnings [#1726]

src/browser/ui/ReactMount.js

@@ -387,7 +387,9 @@ var ReactMount = {
       '_renderNewRootComponent(): Render methods should be a pure function ' +
       'of props and state; triggering nested component updates from ' +
       'render is not allowed. If necessary, trigger nested updates in ' +
-      'componentDidUpdate.'
+      'componentDidUpdate. Check the render method of %s.',
+      ReactCurrentOwner.current && ReactCurrentOwner.current.getName() ||
+        'ReactCompositeComponent'
     );
 
     var componentInstance = instantiateReactComponent(nextElement, null);
@@ -569,10 +571,12 @@ var ReactMount = {
     // render but we still don't expect to be in a render call here.)
     warning(
       ReactCurrentOwner.current == null,
-      'unmountComponentAtNode(): Render methods should be a pure function of ' +
-      'props and state; triggering nested component updates from render is ' +
-      'not allowed. If necessary, trigger nested updates in ' +
-      'componentDidUpdate.'
+      'unmountComponentAtNode(): Render methods should be a pure function ' +
+      'of props and state; triggering nested component updates from render ' +
+      'is not allowed. If necessary, trigger nested updates in ' +
+      'componentDidUpdate. Check the render method of %s.',
+      ReactCurrentOwner.current && ReactCurrentOwner.current.getName() ||
+        'ReactCompositeComponent'
     );
 
     invariant(

src/core/__tests__/ReactCompositeComponent-test.js

@@ -868,7 +868,7 @@ describe('ReactCompositeComponent', function() {
       'Warning: _renderNewRootComponent(): Render methods should ' +
       'be a pure function of props and state; triggering nested component ' +
       'updates from render is not allowed. If necessary, trigger nested ' +
-      'updates in componentDidUpdate.'
+      'updates in componentDidUpdate. Check the render method of Outer.'
     );
   });