Fixes for exit problems.

pkg/analyzer/bin/analyzer.dart

 #!/usr/bin/env 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.
 
 /** The entry point for the analyzer. */
 library analyzer;
 
 import 'dart:async';
@@ skipping 77 matching lines @@
 }
 
 typedef ErrorSeverity BatchRunnerHandler(List<String> args);
 
 /// Provides a framework to read command line options from stdin and feed them to a callback.
 class BatchRunner {
   /**
    * Run the tool in 'batch' mode, receiving command lines through stdin and returning pass/fail
    * status through stdout. This feature is intended for use in unit testing.
    */
-  static ErrorSeverity runAsBatch(List<String> sharedArgs, BatchRunnerHandler handler) {
+  static void runAsBatch(List<String> sharedArgs, BatchRunnerHandler handler) {
     stdout.writeln('>>> BATCH START');
     Stopwatch stopwatch = new Stopwatch();
     stopwatch.start();
     int testsFailed = 0;
     int totalTests = 0;
     ErrorSeverity batchResult = ErrorSeverity.NONE;
     // read line from stdin
     Stream cmdLine = stdin
         .transform(UTF8.decoder)
         .transform(new LineSplitter());
     var subscription = cmdLine.listen((String line) {
       // may be finish
       if (line.isEmpty) {
         var time = stopwatch.elapsedMilliseconds;
         stdout.writeln('>>> BATCH END (${totalTests - testsFailed}/$totalTests) ${time}ms');
-        exit(batchResult.ordinal);
+        exitCode = batchResult.ordinal;
       }
       // prepare aruments
       var args;
       {
         var lineArgs = line.split(new RegExp('\\s+'));
         args = new List<String>();
         args.addAll(sharedArgs);
         args.addAll(lineArgs);
         args.remove('-b');
         args.remove('--batch');
@@ skipping 15 matching lines @@
         stdout.writeln('>>> TEST $resultPassString ${stopwatch.elapsedMilliseconds}ms');
       } catch (e, stackTrace) {
         stderr.writeln(e);
         stderr.writeln(stackTrace);
         stderr.writeln('>>> EOF STDERR');
         stdout.writeln('>>> TEST CRASH');
       }
     });
   }
 }