Narrowly address async function stack overflow parsing case

test/mjsunit/harmony/regress/regress-624300.js

Index: test/mjsunit/harmony/regress/regress-624300.js
diff --git a/test/mjsunit/regress/regress-crbug-600257.js b/test/mjsunit/harmony/regress/regress-624300.js
similarity index 69%
copy from test/mjsunit/regress/regress-crbug-600257.js
copy to test/mjsunit/harmony/regress/regress-624300.js
index 87bd2e39af387cde81f9c9adb15756f8139a03a3..f96fbbb5aaa1a22d4603e0c103372d1333af8f1a 100644
--- a/test/mjsunit/regress/regress-crbug-600257.js
+++ b/test/mjsunit/harmony/regress/regress-624300.js
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --stack-size=100
+// Flags: --harmony-async-await
 
-(function rec() {
+(function f() {
   try {
-    rec();
+    f();
   } catch (e) {
-    /{/;
+    (async() => await 1).length;
   }
 })();