1 files changed, 8 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/parser/bug-1263355-39.js b/js/src/jit-test/tests/parser/bug-1263355-39.js
new file mode 100644
index 0000000000..85d0f8aaef
--- /dev/null
+++ b/js/src/jit-test/tests/parser/bug-1263355-39.js
@@ -0,0 +1,8 @@
+function f() {
+  var init, first;
+  for (let i = (init = () => i = 1, 0); (first = () => i, i) < 0; ++i);
+  assertEq(init(), 1);
+  assertEq(first(), 0);
+}
+
+f();