Added component stack to ReactFiber

Updated unit tests to expect component stack as well

Author: Ethan-Arrowood

packages/react-reconciler/src/ReactFiber.js

@@ -43,6 +43,10 @@ var {NoEffect} = require('ReactTypeOfSideEffect');
 
 var invariant = require('fbjs/lib/invariant');
 
+import ReactDebugCurrentFiber from './ReactDebugCurrentFiber';
+
+var {getCurrentFiberStackAddendum} = ReactDebugCurrentFiber;
+
 if (__DEV__) {
   var getComponentName = require('getComponentName');
   var hasBadMapPolyfill = false;
@@ -393,9 +397,10 @@ function createFiberFromElementType(
     invariant(
       false,
       'Element type is invalid: expected a string (for built-in components) ' +
-        'or a class/function (for composite components) but got: %s.%s',
+        'or a class/function (for composite components) but got: %s.%s%s',
       type == null ? type : typeof type,
       info,
+      getCurrentFiberStackAddendum() || '',
     );
   }
   return fiber;