1 files changed, 8 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/bug1685684.js b/js/src/jit-test/tests/cacheir/bug1685684.js
new file mode 100644
index 0000000000..06b37a852c
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/bug1685684.js
@@ -0,0 +1,8 @@
+let g = newGlobal({immutablePrototype: false});
+g.__proto__ = {};
+g.evaluate(`(function() {
+  for (var i = 0; i < 5; i++) {
+    d = eval('1');
+    assertEq(d, 1);
+  }
+})()`);