1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/RegExp/split-invalid-lastIndex.js b/js/src/tests/ecma_6/RegExp/split-invalid-lastIndex.js
new file mode 100644
index 000000000..3def559ad
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/split-invalid-lastIndex.js
@@ -0,0 +1,31 @@
+var BUGNUMBER = 1263851;
+var summary = "RegExp.prototype[@@split] should handle if lastIndex is out of bound.";
+
+print(BUGNUMBER + ": " + summary);
+
+var myRegExp = {
+    get constructor() {
+        return {
+            get [Symbol.species]() {
+                return function() {
+                    return {
+                        get lastIndex() {
+                            return 9;
+                        },
+                        set lastIndex(v) {},
+                        exec() {
+                            return [];
+                        }
+                    };
+                };
+            }
+        };
+    }
+};
+var result = RegExp.prototype[Symbol.split].call(myRegExp, "abcde");;
+assertEq(result.length, 2);
+assertEq(result[0], "");
+assertEq(result[1], "");
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);