Don't quit debugger when the program terminates, only after `quit`.

tests/dartino_compiler/incremental/dartino_vm_tester.dart

 // Copyright (c) 2014, 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 dartino_compiler.test.dartino_vm_tester;
 
 import 'dart:io' hide
     exitCode,
     stderr,
     stdin,
@@ skipping 197 matching lines @@
 
       // Wait for process termination.
       VmCommand response = await vmContext.runCommand(continueCommand);
       if (response is! commands_lib.ProcessTerminated) {
         // TODO(ahe): It's probably an instance of
         // commands_lib.UncaughtException, and if so, we should try to print
         // the stack trace.
         throw new StateError(
             "Expected ProcessTerminated, but got: $response");
       }
+      vmContext.terminate();
     }
     await vmContext.runCommand(const commands_lib.SessionEnd());
     await vmContext.shutdown();
   }
 
   Future<Null> waitForCompletion() async {
     // TODO(ahe/kustermann/ager): We really need to distinguish VM crashes from
     // normal test failures. This information is based on exitCode and we need
     // to propagate the exitCode back to test.dart, so we can have Fail/Crash
     // outcomes of these tests.
@@ skipping 206 matching lines @@
 
   void add(List<int> data) => builder.add(data);
 
   void close() {
   }
 
   List<String> takeLines() {
     return new LineSplitter().convert(UTF8.decode(builder.takeBytes()));
   }
 }