| Index: test/mjsunit/regress/regress-observe-empty-double-array.js | 
| diff --git a/test/mjsunit/regress/regress-observe-empty-double-array.js b/test/mjsunit/regress/regress-observe-empty-double-array.js | 
| index aea9c73b2291010870a01d496f2a299f6b40dcb2..4b651694a6eeb1a5a0af4d5220fb6c934798fe33 100644 | 
| --- a/test/mjsunit/regress/regress-observe-empty-double-array.js | 
| +++ b/test/mjsunit/regress/regress-observe-empty-double-array.js | 
| @@ -32,6 +32,7 @@ | 
| arr = [1.1]; | 
| Object.observe(arr, function(){}); | 
| arr.length = 0; | 
| -assertTrue(%HasFastDoubleElements(arr)); | 
| +// TODO(observe): we currently disallow fast elements for observed object. | 
| +// assertTrue(%HasFastDoubleElements(arr)); | 
| // Should not crash | 
| arr.push(1.1); | 
|  |