Fix dartc.sh script to use /bin/bash (issue dart:1104)

tools/testing/dart/test_runner.dart

 // 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.
 
 #library("test_runner");
 
 #import("status_file_parser.dart");
 #import("test_progress.dart");
 #import("test_suite.dart");
 
@@ skipping 85 matching lines @@
                     arguments,
                     configuration,
                     completedHandler,
                     expectedOutcomes,
                     [isNegative = false]) : super(displayName,
                                                   executablePath,
                                                   arguments,
                                                   configuration,
                                                   completedHandler,
                                                   expectedOutcomes,
-                                                  isNegative);
+                                                  isNegative) {
+    if (compilerPath != null) {
+      commandLine = 'execution command: $commandLine';
+      String compilationCommand =
+          '$compilerPath ${Strings.join(compilerArguments, " ")}';
+      commandLine = 'compilation command: $compilationCommand\n$commandLine';
+    }
+  }
 }
 
 
 class TestOutput {
   // The TestCase this is the output from.
   TestCase testCase;
   int exitCode;
   bool timedOut;
   bool failed = false;
   List<String> stdout;
@@ skipping 62 matching lines @@
   void exitHandler(int exitCode) {
     new TestOutput(testCase, exitCode, timedOut, stdout,
                    stderr, new Date.now().difference(startTime));
     process.close();
     timeoutTimer.cancel();
     testCase.completed();
   }
 
   void compilerExitHandler(int exitCode) {
     if (exitCode != 0) {
+      stderr.add('test.dart: Compilation step failed (exit code $exitCode)\n');
       exitHandler(exitCode);
     } else {
       process.close();
+      stderr.add('test.dart: Compilation finished, starting execution\n');
+      stdout.add('test.dart: Compilation finished, starting execution\n');
       runCommand(testCase.executablePath, testCase.arguments, exitHandler);
     }
   }
       
   Function makeReadHandler(StringInputStream source, List<String> destination) {
     return () {
       if (source.closed) return;  // TODO(whesse): Remove when bug is fixed.
       var line = source.readLine();
       while (null != line) {
         destination.add(line);
@@ skipping 282 matching lines @@
           test.displayName != 'dartc/junit_tests') {
         _ensureDartcBatchRunnersStarted(test.executablePath);
         _getDartcBatchRunnerProcess().startTest(test);
       } else {
         new RunningProcess(test).start();
       }
       _numProcesses++;
     }
   }
 }