Fix issue 17514770 (https://b2.corp.google.com/issues/17514770)

tests/language/issue_1751477.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'issue_1751477_lib1.dart' deferred as lib1;
+import 'issue_1751477_lib2.dart' deferred as lib2;
+import 'issue_1751477_lib3.dart' deferred as lib3;
+import 'issue_1751477_lib4.dart' deferred as lib4;
+import 'issue_1751477_lib5.dart' deferred as lib5;
+import 'issue_1751477_lib6.dart' deferred as lib6;
+import 'issue_1751477_lib7.dart' deferred as lib7;
+import 'issue_1751477_lib8.dart' deferred as lib8;
+import 'issue_1751477_lib9.dart' deferred as lib9;
+
+main() {
+  lib1.loadLibrary().then((_) {
+    lib2.loadLibrary().then((_) {
+      lib3.loadLibrary().then((_) {
+        lib4.loadLibrary().then((_) {
+          lib5.loadLibrary().then((_) {
+            lib6.loadLibrary().then((_) {
+              lib7.loadLibrary().then((_) {
+                lib8.loadLibrary().then((_) {
+                  lib9.loadLibrary().then((_) {
+                  });
+                });
+              });
+            });
+          });
+        });
+      });
+    });
+  });
+}