Improve the stack trace output to be more readable.

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 "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 4348 matching lines @@
   }
   const intptr_t ident_pos = TokenPos();
   if (IsIdentifier()) {
     variable_name = CurrentLiteral();
     function_name = variable_name;
     ConsumeToken();
   } else {
     if (!is_literal) {
       ErrorMsg("function name expected");
     }
-    function_name = &String::ZoneHandle(Symbols::Function());
+    function_name = &String::ZoneHandle(Symbols::AnonymousClosure());
   }
   ASSERT(ident_pos >= 0);
 
   if (CurrentToken() != Token::kLPAREN) {
     ErrorMsg("'(' expected");
   }
   intptr_t function_pos = TokenPos();
 
   // Check whether we have parsed this closure function before, in a previous
   // compilation. If so, reuse the function object, else create a new one
@@ skipping 4564 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart