Add missing string length check in regexp engine.

test/mjsunit/regress/regress-2172.js

Index: test/mjsunit/regress/regress-2172.js
diff --git a/test/mjsunit/regress/regress-113924.js b/test/mjsunit/regress/regress-2172.js
similarity index 95%
copy from test/mjsunit/regress/regress-113924.js
copy to test/mjsunit/regress/regress-2172.js
index 3ecdec48f219b9ea545702ebf3a396debe7a93f8..09c5466f2ad49d796facc23f0b169ea90a8743d4 100644
--- a/test/mjsunit/regress/regress-113924.js
+++ b/test/mjsunit/regress/regress-2172.js
@@ -25,7 +25,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-var count=12000;
-while(count--) {
-  eval("var a = new Object(10); a[2] += 7;");
+for (var i = 0; i < 10000; i++){
+  (i + "\0").split(/(.)\1/i);

[Erik Corry, 2012/06/14 13:52:39]

Please also test the UTF-16 case.

 }