1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/megamorphic-null-and-undefined.js b/js/src/jit-test/tests/ion/megamorphic-null-and-undefined.js
new file mode 100644
index 0000000000..5f7f804a31
--- /dev/null
+++ b/js/src/jit-test/tests/ion/megamorphic-null-and-undefined.js
@@ -0,0 +1,18 @@
+let objs = [];
+
+for (let i = 0; i < 100; i++) {
+  let obj = {};
+  obj["x" + i] = 1;
+  obj[undefined] = 2;
+  obj[null] = 3;
+  objs.push(obj);
+}
+
+function foo(obj) {
+  assertEq(obj[undefined], 2);
+  assertEq(obj[null], 3);
+}
+
+for (let i = 0; i < 100; i++) {
+  foo(objs[i]);
+}