Simple Qt module producing bug 24945

mod.cpp

#include <QtGui/QApplication>
#include <QtCore/QTimer>
#include <qglobal.h>

#include <cstdio>

static int app_argc = 0;
static char *app_argv[] = {};

static void something() {
  QString msg("test");
  /*******************************************************
   * This is the code that produces the crash, without   *
   * being called. Just the presence of 'toUtf8' makes   *
   * the dlclose crash with SIGSEGV.                     *
   *                                                     *
   * The problem only appears if an application is run.  *
   *******************************************************/
  printf("%s\n", msg.toUtf8().data());
}

extern "C" {
  void run_test(bool run_something) {
    printf("[in mod] Qt lib version: %s.\n", QT_VERSION_STR);
    if (run_something) {
      something();
    }
    QApplication *app = new QApplication(app_argc, app_argv);
    QTimer *timer = new QTimer(app);
    QObject::connect(timer, SIGNAL(timeout()),
        app,   SLOT(quit()));
    timer->start(200);
    app->exec();
    delete app;
  }
}