[async functions] Disallow 'await' in arrow params inside async functions

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 2b8e0fb3a6c8869409a51280d1395b15065ee832..224b57924a0cd7dddd69834d5581bba3e3277b53 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -7798,7 +7798,6 @@ TEST(AsyncAwait) {
     "function foo(await) { return await; }",
     "function* foo() { var await = 1; return await; }",
     "function* foo(await) { return await; }",
-    "var f = (await) => await;",
     "var f = () => { var await = 1; return await; }",
     "var O = { method() { var await = 1; return await; } };",
     "var O = { method(await) { return await; } };",
@@ -7885,6 +7884,16 @@ TEST(AsyncAwaitErrors) {
     "var O = { async method() { function await() {} } }",
     "async function foo() { function await() {} }",
 
+    "async function foo() { var f = await => 42; }",
+    "async function foo() { var f = (await) => 42; }",
+    "async function foo() { var f = (await, a) => 42; }",
+    "async function foo() { var f = (...await) => 42; }",
+
+    "async function f() { return (await) }",
+    "async function f() { return (await, f) }",
+    "async function f() { return [await] }",
+    "async function f() { return (await = 42) }",

[Dan Ehrenberg, 2016/08/22 01:48:53]

Consider adding tests for other kinds of async functions, e.g. async concise
bodies.

[adamk, 2016/08/22 17:59:59]

I've refactored this test to have a section for statements inside a variety of
async function forms, and put these tests in that section.

+
     // Henrique Ferreiro's bug (tm)
     "(async function foo1() { } foo2 => 1)",
     "(async function foo3() { } () => 1)",