[regexp] Fix matching of regexps that are both sticky and anchored at end.

test/mjsunit/es6/regexp-sticky.js

Index: test/mjsunit/es6/regexp-sticky.js
diff --git a/test/mjsunit/es6/regexp-sticky.js b/test/mjsunit/es6/regexp-sticky.js
index c0633f9173eb645a71b1718fbae6dabc1b7af9ab..df39763694334b97eb6141232d1a9529c4d8238c 100644
--- a/test/mjsunit/es6/regexp-sticky.js
+++ b/test/mjsunit/es6/regexp-sticky.js
@@ -128,3 +128,10 @@ mhat.lastIndex = 2;
 assertFalse(mhat.test("..foo"));
 mhat.lastIndex = 2;
 assertTrue(mhat.test(".\nfoo"));
+
+// Check that we don't apply incorrect optimization to sticky regexps that
+// are anchored at end.
+var stickyanchored = /bar$/y;
+assertFalse(stickyanchored.test("foobar"));
+stickyanchored.lastIndex = 3;
+assertTrue(stickyanchored.test("foobar"));