| Index: test/mjsunit/es6/regress/regress-2034.js
 | 
| diff --git a/test/mjsunit/es6/regress/regress-2034.js b/test/mjsunit/es6/regress/regress-2034.js
 | 
| index 5c738bf84d9fc46b979c90b12114aca2bf944e6d..1b7dac038aa6356dd6066359d2e2bd965a97209b 100644
 | 
| --- a/test/mjsunit/es6/regress/regress-2034.js
 | 
| +++ b/test/mjsunit/es6/regress/regress-2034.js
 | 
| @@ -25,6 +25,8 @@
 | 
|  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 | 
|  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 | 
|  
 | 
| +// Flags: --harmony-weak-collections
 | 
| +
 | 
|  var key = {};
 | 
|  var map = new WeakMap;
 | 
|  Object.preventExtensions(key);
 | 
| 
 |