Fixed the first issue in debug_lib.dart

tests/standalone/debugger/debug_lib.dart

 // Copyright (c) 2013, 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.
 
 // Library used by debugger wire protocol tests (standalone VM debugging).
 
 library DartDebugger;
 
 import "dart:io";
 import "dart:utf";
@@ skipping 305 matching lines @@
   int seqNr = 0;  // Sequence number of next debugger command message.
   Command lastCommand = null;  // Most recent command sent to target.
   List<String> errors = new List();
 
   // Data collected from debug target.
   Map currentMessage = null;  // Currently handled message sent by target.
   String scriptUrl = null;
   bool shutdownEventSeen = false;
   int isolateId = 0;
 
-  // stdin subscription to allow terminating the test via command-line.
-  var stdinSubscription;
-
   Debugger(this.targetProcess, this.portNumber) {
-    stdinSubscription =
-        stdin.listen((d) {},
-                     onError: (error) => close(killDebugee: true),
-                     onDone: () => close(killDebugee: true));
-
     var stdoutStringStream = targetProcess.stdout
         .transform(new StringDecoder())
         .transform(new LineTransformer());
     stdoutStringStream.listen((line) {
       if (showDebuggeeOutput) {
         print("TARG: $line");
       }
     });
 
     var stderrStringStream = targetProcess.stderr
@@ skipping 148 matching lines @@
             close(killDebugee: true);
           });
       });
   }
 
   void close({killDebugee: false}) {
     if (errorsDetected) {
       for (int i = 0; i < errors.length; i++) print(errors[i]);
     }
     socket.close();
-    stdinSubscription.cancel();
     if (killDebugee) {
       targetProcess.kill();
       print("Target process killed");
     }
     Expect.isTrue(!errorsDetected);
     stdin.close();
     stdout.close();
     stderr.close();
   }
 }
 
 
 bool RunScript(List script) {
   var options = new Options();
   if (options.arguments.contains("--debuggee")) {
     return false;
   }
-  showDebuggeeOutput = options.arguments.contains("--verbose");
+  // The default is to show debugging output.
+  showDebuggeeOutput = !options.arguments.contains("--non-verbose");

[Ivan Posva, 2013/03/26 15:58:38]

--no-verbose

   verboseWire = options.arguments.contains("--wire");
 
   var targetOpts = [ "--debug:$debugPort" ];
   if (showDebuggeeOutput) targetOpts.add("--verbose_debug");
   targetOpts.add(options.script);
   targetOpts.add("--debuggee");
 
   Process.start(options.executable, targetOpts).then((Process process) {
     print("Debug target process started");
     process.stdin.close();
     process.exitCode.then((int exitCode) {
       Expect.equals(0, exitCode);
-      Expect.equals(0, exitCode);
       print("Debug target process exited with exit code $exitCode");
     });
     var debugger = new Debugger(process, debugPort);
     debugger.runScript(script);
   });
   return true;
 }