1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/baseline/unboxed-expando-type-update.js b/js/src/jit-test/tests/baseline/unboxed-expando-type-update.js
new file mode 100644
index 0000000000..ad7bca5b77
--- /dev/null
+++ b/js/src/jit-test/tests/baseline/unboxed-expando-type-update.js
@@ -0,0 +1,18 @@
+function f() {
+    var a = [];
+    for (var i=0; i<100; i++)
+        a.push({x: i});
+
+    var vals = [1, "", true, null];
+
+    for (var j=0; j<100; j++) {
+        var v = vals[j % vals.length];
+        a[95].y = v;
+        assertEq(a[95].y, v);
+        a[j].z1 = v;
+        a[j].z2 = v;
+        assertEq(a[j].z1, v);
+        assertEq(a[j].z2, v);
+    }
+}
+f();