Fixing release build

runtime/vm/ast_printer.cc

 // Copyright (c) 2011, 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/ast_printer.h"
 
 #include "vm/handles.h"
 #include "vm/object.h"
 #include "vm/os.h"
 #include "vm/parser.h"
@@ skipping 39 matching lines @@
     case ReturnNode::kContinuation:
       kind = "continuation ";
       break;
     case ReturnNode::kContinuationTarget:
       kind = "continuation-target ";
       break;
     case ReturnNode::kRegular:
       kind = "";
       break;
     default:
+      kind = "";
       UNREACHABLE();
   }
   OS::Print("(%s %s", node->PrettyName(), kind);
   node->VisitChildren(this);
   OS::Print(")");
 }
 
 
 void AstPrinter::VisitGenericLocalNode(AstNode* node,
                                        const LocalVariable& var) {
@@ skipping 470 matching lines @@
   ASSERT(node_sequence != NULL);
   AstPrinter ast_printer;
   const char* function_name =
       parsed_function.function().ToFullyQualifiedCString();
   OS::Print("Ast for function '%s' {\n", function_name);
   node_sequence->Visit(&ast_printer);
   OS::Print("}\n");
 }
 
 }  // namespace dart