GTK+2 - GtkFileChooserButton shows (none) as selected folder an d crashes

Some of my application’s users declare a strange problem with a particular widget: GtkFileChooserButton.

I needed to provide a way to select a single folder, so I used the widget this way:

GtkWidget* button_outfolder = gtk_file_chooser_button_new(_("Select output folder"), GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER);
output_folder_string = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(button_outfolder)); // store the default value
gtk_widget_set_size_request(button_outfolder, 180, 30);

The problem is that, when the widget is displayed for the first time, it shows the text “(none)” instead of a default folder’s name. When the user clicks on it to select a valid path, the entire program crashes with a segfault (I can’t provide further information right now).

This thing does not happen to everyone: for example, I’ve never seen this behaviour with my systems (Windows 7/8, 64bit, GTK+ 2.22 and Linux 64bit with GTK+ 3), but some other users with apparently the same environments are experiencing it.

I tried to workaround this issue by forcing the default folder at startup with:

gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(button_outfolder), "");

Nothing to do, the problem remains for “someone”.

Did anyone ever experience this bug? Is it reported somewhere? Am I doing something wrong in my code?

Thank you!

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