Fix prefix errors with --noopt

runtime/vm/parser.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/parser.h"
 
 #include "lib/invocation_mirror.h"
 #include "platform/utils.h"
 #include "vm/ast_transformer.h"
 #include "vm/bootstrap.h"
@@ skipping 12034 matching lines @@
         ResolveIdentInLocalScope(ident_pos, type_name, NULL)) {
       // The type is malformed. Skip over its type arguments.
       ParseTypeArguments(ClassFinalizer::kIgnore);
       return ClassFinalizer::NewFinalizedMalformedType(
           Error::Handle(Z),  // No previous error.
           script_,
           ident_pos,
           "using '%s' in this context is invalid",
           type_name.ToCString());
     }
-    if (!FLAG_load_deferred_eagerly &&
+    if ((!FLAG_load_deferred_eagerly || !allow_deferred_type) &&

[hausner, 2015/07/10 21:47:49]

This is becoming kind of unreadable.

         !prefix->IsNull() && prefix->is_deferred_load()) {
       // If deferred prefixes are allowed but it is not yet loaded,
       // remember that this function depends on the prefix.
       if (allow_deferred_type && !prefix->is_loaded()) {
         if (parsed_function() != NULL) {
           parsed_function()->AddDeferredPrefix(*prefix);
         }
       }
       // If the deferred prefixes are not allowed, or if the prefix is not yet
       // loaded when finalization is requested, return a malformed type.
@@ skipping 1561 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart