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-rw-r--r--js/src/tests/non262/Function/arguments-extra-property.js33
1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/non262/Function/arguments-extra-property.js b/js/src/tests/non262/Function/arguments-extra-property.js
new file mode 100644
index 0000000000..017734382d
--- /dev/null
+++ b/js/src/tests/non262/Function/arguments-extra-property.js
@@ -0,0 +1,33 @@
+var BUGNUMBER = 1263811;
+var summary = "GetElem for modified arguments shouldn't be optimized to get original argument.";
+
+print(BUGNUMBER + ": " + summary);
+
+function testModifyFirst() {
+ function f() {
+ Object.defineProperty(arguments, 1, { value: 30 });
+ assertEq(arguments[1], 30);
+ }
+ for (let i = 0; i < 10; i++)
+ f(10, 20);
+}
+testModifyFirst();
+
+function testModifyLater() {
+ function f() {
+ var ans = 20;
+ for (let i = 0; i < 10; i++) {
+ if (i == 5) {
+ Object.defineProperty(arguments, 1, { value: 30 });
+ ans = 30;
+ }
+ assertEq(arguments[1], ans);
+ }
+ }
+ for (let i = 0; i < 10; i++)
+ f(10, 20);
+}
+testModifyLater();
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);