#0  0x00005574d6b0321c in read_buffer (source=0x5574d8861690) at glade-previewer-main.c:197
  192:     {
  193:       g_free (token);
  194:       if (g_io_channel_read_line (source, &token, NULL, NULL, &error) !=
  195:           G_IO_STATUS_NORMAL)
  196:         {
  197:           g_printerr (_("Error: %s.\n"), error->message);
  198:           g_error_free (error);
  199:           exit (1);
  200:         }
  201:       tmp = buffer;
  202:       buffer = g_strconcat (buffer, token, NULL);
#1  on_data_incoming (source=0x5574d8861690, condition=G_IO_HUP, data=0x5574d8661360) at glade-previewer-main.c:218
  213: {
  214:   GladePreviewerApp *app = data;
  215:   GObject *new_widget;
  216:   gchar *buffer;
  217: 
  218:   buffer = read_buffer (source);
  219:   if (buffer == NULL)
  220:     {
  221:       gtk_main_quit ();
  222:       return FALSE;
  223:     }
#2  0x00007f49f35290f5 in g_main_dispatch (context=0x5574d8698090) at ../../../../glib/gmain.c:3177
  [Error: gmain.c was not found in source tree]
#3  g_main_context_dispatch (context=context@entry=0x5574d8698090) at ../../../../glib/gmain.c:3830
  [Error: gmain.c was not found in source tree]
#4  0x00007f49f35294c0 in g_main_context_iterate (context=0x5574d8698090, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3903
  [Error: gmain.c was not found in source tree]
#5  0x00007f49f35297d2 in g_main_loop_run (loop=0x5574d87765d0) at ../../../../glib/gmain.c:4099
  [Error: gmain.c was not found in source tree]
#6  0x00007f49f4849555 in gtk_main () at ../../../../gtk/gtkmain.c:1323
  [Error: gtkmain.c was not found in source tree]
#7  0x00005574d6b02aa8 in main (argc=<optimized out>, argv=<optimized out>) at glade-previewer-main.c:376
  371:       GIOChannel *input = g_io_channel_unix_new (fileno (stdin));
  372: #endif
  373: 
  374:       g_io_add_watch (input, G_IO_IN | G_IO_HUP, on_data_incoming, app);
  375: 
  376:       gtk_main ();
  377:     }
  378:   else if (template)
  379:     {
  380:       gchar *contents = NULL;
  381:       gsize size;