xwm_get_render_format: check NULL return value
@@ -1254,6 +1254,10 @@ static void xwm_get_render_format(struct wlr_xwm *xwm) {
xcb_render_query_pict_formats(xwm->xcb_conn);
xcb_render_query_pict_formats_reply_t *reply =
xcb_render_query_pict_formats_reply(xwm->xcb_conn, cookie, NULL);
+ if (!reply) {
+ wlr_log(L_ERROR, "Did not get any reply from xcb_rrender_query_pict_formats");
+ return;
+ }
xcb_render_pictforminfo_iterator_t iter =
xcb_render_query_pict_formats_formats_iterator(reply);
xcb_render_pictforminfo_t *format = NULL;
