| Index: sdk/lib/_internal/compiler/implementation/ssa/optimize.dart | 
| =================================================================== | 
| --- sdk/lib/_internal/compiler/implementation/ssa/optimize.dart	(revision 14621) | 
| +++ sdk/lib/_internal/compiler/implementation/ssa/optimize.dart	(working copy) | 
| @@ -398,7 +398,6 @@ | 
| HInstruction right = node.right; | 
| HType leftType = types[left]; | 
| HType rightType = types[right]; | 
| -    assert(!leftType.isConflicting() && !rightType.isConflicting()); | 
|  | 
| // We don't optimize on numbers to preserve the runtime semantics. | 
| if (!(left.isNumberOrNull(types) && right.isNumberOrNull(types)) && | 
|  |