1 files changed, 8 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug646968-8.js b/js/src/jit-test/tests/basic/bug646968-8.js
new file mode 100644
index 0000000000..9214f0798f
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug646968-8.js
@@ -0,0 +1,8 @@
+load(libdir + "evalInFrame.js");
+
+var x = 5;
+{
+    let x = eval("this.x++");
+    assertEq(evalInFrame(0, "x"), 5);
+}
+assertEq(x, 6);