Program: 141674
Project: 141674
Buggy source:
@Override public void widgetSelected(SelectionEvent e){
  if (((Combo)e.getSource()).getText().startsWith(ESB_RUNTIME_ITEM)) {
    IPreferenceStore store=ESBRunContainerPlugin.getDefault().getPreferenceStore();
    String host=store.getString(RunContainerPreferenceInitializer.P_ESB_RUNTIME_HOST);
    File containerDir=new File(store.getString(RunContainerPreferenceInitializer.P_ESB_RUNTIME_LOCATION));
    if (containerDir.exists() || !(host.equals("String_Node_Str") || host.equals("String_Node_Str"))) {
      defaultContextManager=RunProcessPlugin.getDefault().getRunProcessContextManager();
      esbProcessContext=defaultContextManager.getActiveContext();
      if (runtimeContextManager == null) {
        runtimeContextManager=new RunContainerProcessContextManager();
      }
      RunProcessPlugin.getDefault().setRunProcessContextManager(runtimeContextManager);
      RunProcessPlugin.getDefault().getRunProcessContextManager().setActiveProcess(esbProcessContext.getProcess());
      ProcessManager.getInstance().setProcessContext(runtimeContextManager.getActiveContext());
    }
 else {
      boolean openPrefs=MessageDialog.openConfirm(jobComposite.getShell(),RunContainerMessages.getString("String_Node_Str"),RunContainerMessages.getString("String_Node_Str"));
      if (openPrefs) {
        PreferenceDialog d=new PreferenceDialog(jobComposite.getShell(),PlatformUI.getWorkbench().getPreferenceManager());
        d.setSelectedNode(RunContainerPreferencePage.ID);
        d.open();
      }
    }
  }
 else   if (defaultContextManager != null) {
    RunProcessPlugin.getDefault().setRunProcessContextManager(defaultContextManager);
  }
}

Fixed version (ground truth):
@Override public void widgetSelected(SelectionEvent e){
  if (((Combo)e.getSource()).getText().startsWith(ESB_RUNTIME_ITEM)) {
    IPreferenceStore store=ESBRunContainerPlugin.getDefault().getPreferenceStore();
    String host=store.getString(RunContainerPreferenceInitializer.P_ESB_RUNTIME_HOST);
    File containerDir=new File(store.getString(RunContainerPreferenceInitializer.P_ESB_RUNTIME_LOCATION));
    if (containerDir.exists() || !(host.equals("String_Node_Str") || host.equals("String_Node_Str"))) {
      defaultContextManager=RunProcessPlugin.getDefault().getRunProcessContextManager();
      esbProcessContext=defaultContextManager.getActiveContext();
      if (runtimeContextManager == null) {
        runtimeContextManager=new RunContainerProcessContextManager();
      }
      RunProcessPlugin.getDefault().setRunProcessContextManager(runtimeContextManager);
      RunProcessPlugin.getDefault().getRunProcessContextManager().setActiveProcess(esbProcessContext.getProcess());
      ProcessManager.getInstance().setProcessContext(runtimeContextManager.getActiveContext());
    }
 else {
      boolean openPrefs=MessageDialog.openConfirm(jobComposite.getShell(),RunContainerMessages.getString("String_Node_Str"),RunContainerMessages.getString("String_Node_Str"));
      if (openPrefs) {
        PreferenceDialog dlg=new PreferenceDialog(jobComposite.getShell(),PlatformUI.getWorkbench().getPreferenceManager());
        dlg.setSelectedNode(RunContainerPreferencePage.ID);
        dlg.open();
        ((Combo)e.getSource()).select(index);
      }
    }
  }
 else   if (defaultContextManager != null) {
    RunProcessPlugin.getDefault().setRunProcessContextManager(defaultContextManager);
  }
}