Add m-esr52 at 52.6.0

1 files changed, 28 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/arrow-functions/bug-885067-2.js b/js/src/jit-test/tests/arrow-functions/bug-885067-2.js
new file mode 100644
index 000000000..a45bdccb8
--- /dev/null
+++ b/js/src/jit-test/tests/arrow-functions/bug-885067-2.js
@@ -0,0 +1,28 @@
+// deoptimize `arguments` in the arrow's closest enclosing non-arrow-function
+
+// non-arrow-function -> arrow function
+a = 0;
+(function() {
+    a = (() => eval("arguments"))();
+})(1, 2, 3, 4);
+assertEq(a.length, 4);
+
+// non-arrow-function -> arrow function -> arrow function
+a = 0;
+(function() {
+    (() => {
+        a = (() => eval("arguments"))();
+    })();
+})(1, 2, 3, 4);
+assertEq(a.length, 4);
+
+// non-arrow-function -> arrow function -> non-arrow-function -> arrow function
+a = 0;
+(function() {
+    (() => {
+        (function () {
+            a = (() => eval("arguments"))();
+        })(1, 2, 3, 4);
+    })();
+})();
+assertEq(a.length, 4);