I have the following code which I expected to compile fine:


using GConf;

int main ()
{
    GConf.Client gc = GConf.Client.get_default();
    string root = "/apps/myapp";
    weak GLib.SList<GConf.Entry> entrylist = gc.all_entries(root);
    foreach (GConf.Entry entry in entrylist) {
        stdout.printf("Key: %s Value: %s\n",
            entry.key,
            entry.get_value().get_bool()?"True":"False"
        );
    }
    return 0;
}


But it fails with the following message:
$ jhbuild run valac --pkg gconf-2.0 --pkg glib-2.0 vala-gconf-lists.vala
vala-gconf-lists.vala:7.46-7.65: warning: unhandled error `GLib.Error'
    weak GLib.SList<GConf.Entry> entrylist = gc.all_entries(root);
                                             ^^^^^^^^^^^^^^^^^^^^
vala-gconf-lists.c: In function ‘_main’:
vala-gconf-lists.c:40: error: void value not ignored as it ought to be
error: cc exited with status 256
Compilation failed: 1 error(s), 1 warning(s)

The corresponding line in the C Code is:
			entry = (_tmp1 = ((GConfEntry*) (entry_it->data)), (_tmp1 == NULL ? NULL : gconf_entry_ref (_tmp1)));


The gconf_entry_ref (_tmp1) seems to be a problem. So if I do a
    foreach (weak GConf.Entry entry in entrylist) {
it compiles fine.