WebKit Foursquare authenticate segmentation fault

#include <gtk/gtk.h>
#include <webkit/webkit.h>

void
set_fake_mobile (WebKitWebView *web_view)
{
  WebKitWebSettings *settings;

  settings = webkit_web_view_get_settings (web_view);

  /* This is based on the HTC Wildfire's user agent. Some
   * providers, like Google, refuse to provide the mobile
   * version of their authentication pages otherwise. eg.,
   * in Google's case, passing btmpl=mobile does not help.
   *
   * The actual user agent used by a HTC Wildfire is:
   * Mozilla/5.0 (Linux; U; Android 2.2.1; en-us; HTC Wildfire
   * Build/FRG83D) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0
   * Mobile Safari/533.1
   *
   * Also note that the user agents of some mobile browsers may
   * not work. eg., Nokia N9.
   */
  g_object_set (G_OBJECT (settings),
                "user-agent", "Mozilla/5.0 (GNOME; not Android) "
                              "AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile",
                NULL);
}

int
main(int argc, char *argv[])
{
    GtkWidget *main_window;
    GtkWidget *scrolled_window;
    GtkWidget *web_view;

    gtk_init (&argc, &argv);

    /* Create the widgets */
    main_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    scrolled_window = gtk_scrolled_window_new (NULL, NULL);
    web_view = webkit_web_view_new ();

    /* Place the WebKitWebView in the GtkScrolledWindow */
    gtk_container_add (GTK_CONTAINER (scrolled_window), web_view);
    gtk_container_add (GTK_CONTAINER (main_window), scrolled_window);

    /* Use mobile user agent */
    set_fake_mobile (WEBKIT_WEB_VIEW (web_view));

    /* Open a webpage */
    webkit_web_view_load_uri (WEBKIT_WEB_VIEW (web_view), "https://es.foursquare.com/oauth2/authenticate?response_type=token&client_id=MBNU2NES5HASNDQJ25YPFGG2UGRZHPI3IYTNJGE0KIWT2HCF&redirect_uri=https%3A%2F%2Flocalhost%2F");

    /* Show the result */
    g_signal_connect (main_window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
    gtk_window_set_default_size (GTK_WINDOW (main_window), 800, 600);
    gtk_widget_show_all (main_window);

    gtk_main ();

    return 0;
}