1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncGenerators/for-await-of-error.js b/js/src/tests/non262/AsyncGenerators/for-await-of-error.js
new file mode 100644
index 0000000000..36e10313a4
--- /dev/null
+++ b/js/src/tests/non262/AsyncGenerators/for-await-of-error.js
@@ -0,0 +1,26 @@
+var BUGNUMBER = 1391519;
+var summary = "for-await-of outside of async function should provide better error";
+
+print(BUGNUMBER + ": " + summary);
+
+let caught = false;
+try {
+    eval("for await (let x of []) {}");
+} catch(e) {
+    assertEq(e.message.includes("for await (... of ...) is only valid in"), true);
+    caught = true;
+}
+assertEq(caught, true);
+
+// Extra `await` shouldn't throw that error.
+caught = false;
+try {
+    eval("async function f() { for await await (let x of []) {} }");
+} catch(e) {
+    assertEq(e.message, "missing ( after for");
+    caught = true;
+}
+assertEq(caught, true);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);