Fix a number of tests that incorrectly used assertUnreachable.

test/mjsunit/regress/regress-1160.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // See: http://code.google.com/p/v8/issues/detail?id=1160
 
 // Array.prototype.join uses a temporary array internally. Verify it
 // does not crash and throws an illegal argument exception instead
 // when keyed store on the array does not work as expected because of
 // the setter on its prototype.
 
-try {
-  var N = 100;
-  var array = Array(N);
-  for (var i = 0; i < N; ++i) {
-    array[i] = i;
-  }
-  Array.prototype.__defineSetter__(32, function() { });
-  // The next line throws. We should make it work even with changed
-  // prototype. See http://code.google.com/p/v8/issues/detail?id=1161
-  array.join(",");
-  assertUnreachable();
-} catch (e) { }
+var N = 10;
+var array = Array(N);
+for (var i = 0; i < N; ++i) {
+  array[i] = i;
+}
+Array.prototype.__defineSetter__(2, function() { });
+assertEquals("0,1,2,3,4,5,6,7,8,9", array.join(","));