| Index: pkg/compiler/lib/src/world.dart | 
| diff --git a/pkg/compiler/lib/src/world.dart b/pkg/compiler/lib/src/world.dart | 
| index 481bd3888b1c38f689230551ba2f846e3ad4ce0d..b8925b3bbe61dd5abac70488952b7e2516edc109 100644 | 
| --- a/pkg/compiler/lib/src/world.dart | 
| +++ b/pkg/compiler/lib/src/world.dart | 
| @@ -131,6 +131,7 @@ class World implements ClassWorld { | 
| ClassElement get intClass => compiler.intClass; | 
| ClassElement get doubleClass => compiler.doubleClass; | 
| ClassElement get stringClass => compiler.stringClass; | 
| +  ClassElement get nullClass => compiler.nullClass; | 
|  | 
| /// Cache of [ti.FlatTypeMask]s grouped by the 8 possible values of the | 
| /// [ti.FlatTypeMask.flags] property. | 
|  |