Red Hat BZ#985147 - looks like a port test request failed, after the remote preferences window had been closed, so the window had been unreferenced and destroyed. check it's a valid window before trying to use it as a parent.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/trg-remote-prefs-dialog.c b/src/trg-remote-prefs-dialog.c
index f8bd43b..d90123c 100644
--- a/src/trg-remote-prefs-dialog.c
+++ b/src/trg-remote-prefs-dialog.c
@@ -435,8 +435,8 @@ static gboolean on_port_tested(gpointer data)
                 gtk_label_set_markup(GTK_LABEL(priv->port_test_label),
                                      _
                                      ("Port is <span font_weight=\"bold\" fgcolor=\"red\">closed</span>"));
-        } else {
-            trg_error_dialog(GTK_WINDOW(data), response);
+        } else if (GTK_IS_WINDOW(data)) {
+          trg_error_dialog(GTK_WINDOW(data), response);
         }
     }