Program: 125818
Project: 125818
Buggy source:
@Override public Object start(IApplicationContext context) throws Exception {
  Display display=PlatformUI.createDisplay();
  try {
    if (GlobalServiceRegister.getDefault().isServiceRegistered(IMavenUIService.class)) {
      IMavenUIService mavenUIService=(IMavenUIService)GlobalServiceRegister.getDefault().getService(IMavenUIService.class);
      if (mavenUIService != null) {
        mavenUIService.checkUserSettings(new NullProgressMonitor());
        mavenUIService.updateMavenResolver(false);
        mavenUIService.addMavenConfigurationChangeListener();
      }
    }
    Shell shell=new Shell(display,SWT.ON_TOP);
    Object instanceLocationCheck=acquireWorkspaceLock(shell);
    if (instanceLocationCheck != null) {
      shell.dispose();
      return instanceLocationCheck;
    }
    CoreRepositoryPlugin.getDefault().setRCPMode();
    checkBrowserSupport();
    IMigrationToolService service=(IMigrationToolService)GlobalServiceRegister.getDefault().getService(IMigrationToolService.class);
    service.executeWorspaceTasks();
    boolean logUserOnProject=logUserOnProject(display.getActiveShell());
    try {
      if (!logUserOnProject) {
        context.applicationRunning();
        return EXIT_OK;
      }
    }
  finally {
      shell.dispose();
    }
    if (System.getProperty(org.eclipse.equinox.app.IApplicationContext.EXIT_DATA_PROPERTY) != null) {
      return IApplication.EXIT_RELAUNCH;
    }
    boolean afterUpdate=false;
    if (GlobalServiceRegister.getDefault().isServiceRegistered(ICoreTisService.class)) {
      ICoreTisService tisService=(ICoreTisService)GlobalServiceRegister.getDefault().getService(ICoreTisService.class);
      afterUpdate=tisService.needRestartAfterUpdate();
    }
    if (LoginHelper.isRestart) {
      if (afterUpdate) {
        EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_RELOAD_COMMAND,Boolean.TRUE.toString(),false);
        EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_DISABLE_LOGINDIALOG_COMMAND,null,true);
        return IApplication.EXIT_RELAUNCH;
      }
      return IApplication.EXIT_RESTART;
    }
    IBrandingService brandingService=(IBrandingService)GlobalServiceRegister.getDefault().getService(IBrandingService.class);
    if (brandingService.isPoweredbyTalend()) {
      IPreferenceStore store=PlatformUI.getPreferenceStore();
      store.putValue(IWorkbenchPreferenceConstants.PRESENTATION_FACTORY_ID,"String_Node_Str");
    }
    IPreferenceStore store=PlatformUI.getPreferenceStore();
    String lastProjectType=store.getString("String_Node_Str");
    String projectType=ProjectManager.getInstance().getCurrentProject().getEmfProject().getType();
    if (projectType == null) {
      projectType=System.getProperty("String_Node_Str");
    }
    if (lastProjectType != null && !"String_Node_Str".equals(lastProjectType) && !lastProjectType.equals(projectType) || BrandingChecker.isBrandingChanged()) {
      if (projectType != null) {
        store.putValue("String_Node_Str",projectType);
      }
      System.setProperty("String_Node_Str",Boolean.TRUE.toString());
    }
    int returnCode=PlatformUI.createAndRunWorkbench(display,new ApplicationWorkbenchAdvisor());
    if (returnCode == PlatformUI.RETURN_RESTART) {
      EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_RELOAD_COMMAND,Boolean.FALSE.toString(),false);
      EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_PROJECT_TYPE_COMMAND,null,true);
      EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_DISABLE_LOGINDIALOG_COMMAND,null,true,true);
      if (Platform.inDevelopmentMode()) {
        return IApplication.EXIT_RESTART;
      }
      return IApplication.EXIT_RELAUNCH;
    }
 else {
      return IApplication.EXIT_OK;
    }
  }
  finally {
    display.dispose();
    Location instanceLoc=Platform.getInstanceLocation();
    if (instanceLoc != null) {
      instanceLoc.release();
    }
  }
}

Fixed version (ground truth):
@Override public Object start(IApplicationContext context) throws Exception {
  Display display=PlatformUI.createDisplay();
  try {
    Shell shell=new Shell(display,SWT.ON_TOP);
    Object instanceLocationCheck=acquireWorkspaceLock(shell);
    if (instanceLocationCheck != null) {
      shell.dispose();
      return instanceLocationCheck;
    }
    if (GlobalServiceRegister.getDefault().isServiceRegistered(IMavenUIService.class)) {
      IMavenUIService mavenUIService=(IMavenUIService)GlobalServiceRegister.getDefault().getService(IMavenUIService.class);
      if (mavenUIService != null) {
        mavenUIService.checkUserSettings(new NullProgressMonitor());
        mavenUIService.updateMavenResolver(false);
        mavenUIService.addMavenConfigurationChangeListener();
      }
    }
    CoreRepositoryPlugin.getDefault().setRCPMode();
    checkBrowserSupport();
    IMigrationToolService service=(IMigrationToolService)GlobalServiceRegister.getDefault().getService(IMigrationToolService.class);
    service.executeWorspaceTasks();
    boolean logUserOnProject=logUserOnProject(display.getActiveShell());
    try {
      if (!logUserOnProject) {
        context.applicationRunning();
        return EXIT_OK;
      }
    }
  finally {
      shell.dispose();
    }
    if (System.getProperty(org.eclipse.equinox.app.IApplicationContext.EXIT_DATA_PROPERTY) != null) {
      return IApplication.EXIT_RELAUNCH;
    }
    boolean afterUpdate=false;
    if (GlobalServiceRegister.getDefault().isServiceRegistered(ICoreTisService.class)) {
      ICoreTisService tisService=(ICoreTisService)GlobalServiceRegister.getDefault().getService(ICoreTisService.class);
      afterUpdate=tisService.needRestartAfterUpdate();
    }
    if (LoginHelper.isRestart) {
      if (afterUpdate) {
        EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_RELOAD_COMMAND,Boolean.TRUE.toString(),false);
        EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_DISABLE_LOGINDIALOG_COMMAND,null,true);
        return IApplication.EXIT_RELAUNCH;
      }
      return IApplication.EXIT_RESTART;
    }
    IBrandingService brandingService=(IBrandingService)GlobalServiceRegister.getDefault().getService(IBrandingService.class);
    if (brandingService.isPoweredbyTalend()) {
      IPreferenceStore store=PlatformUI.getPreferenceStore();
      store.putValue(IWorkbenchPreferenceConstants.PRESENTATION_FACTORY_ID,"String_Node_Str");
    }
    IPreferenceStore store=PlatformUI.getPreferenceStore();
    String lastProjectType=store.getString("String_Node_Str");
    String projectType=ProjectManager.getInstance().getCurrentProject().getEmfProject().getType();
    if (projectType == null) {
      projectType=System.getProperty("String_Node_Str");
    }
    if (lastProjectType != null && !"String_Node_Str".equals(lastProjectType) && !lastProjectType.equals(projectType) || BrandingChecker.isBrandingChanged()) {
      if (projectType != null) {
        store.putValue("String_Node_Str",projectType);
      }
      System.setProperty("String_Node_Str",Boolean.TRUE.toString());
    }
    int returnCode=PlatformUI.createAndRunWorkbench(display,new ApplicationWorkbenchAdvisor());
    if (returnCode == PlatformUI.RETURN_RESTART) {
      EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_RELOAD_COMMAND,Boolean.FALSE.toString(),false);
      EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_PROJECT_TYPE_COMMAND,null,true);
      EclipseCommandLine.updateOrCreateExitDataPropertyWithCommand(EclipseCommandLine.TALEND_DISABLE_LOGINDIALOG_COMMAND,null,true,true);
      if (Platform.inDevelopmentMode()) {
        return IApplication.EXIT_RESTART;
      }
      return IApplication.EXIT_RELAUNCH;
    }
 else {
      return IApplication.EXIT_OK;
    }
  }
  finally {
    display.dispose();
    Location instanceLoc=Platform.getInstanceLocation();
    if (instanceLoc != null) {
      instanceLoc.release();
    }
  }
}