1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/xdr/bug1585158.js b/js/src/jit-test/tests/xdr/bug1585158.js
new file mode 100644
index 0000000000..a64d5cf7aa
--- /dev/null
+++ b/js/src/jit-test/tests/xdr/bug1585158.js
@@ -0,0 +1,12 @@
+gczeal(4);
+evalWithCache(`
+  var obj = { a: 1, b: 2 };
+  obj.a++;
+  assertEq(obj.a, 2);
+`);
+function evalWithCache(code) {
+  code = cacheEntry(code);
+  ctx_save = Object.create({}, { saveIncrementalBytecode: { value: true } });
+  var res1 = evaluate(code, ctx_save);
+  var res2 = evaluate(code, Object.create(ctx_save, {}));
+}