Index: trunk/src_plugins/lib_hid_pcbui/layersel.c
===================================================================
--- trunk/src_plugins/lib_hid_pcbui/layersel.c	(revision 27714)
+++ trunk/src_plugins/lib_hid_pcbui/layersel.c	(revision 27715)
@@ -792,7 +792,8 @@
 	lys = (ls_layer_t **)ls->ui_layer.array;
 	for(n = 0; n < vtp0_len(&pcb_uilayers); n++,lys++) {
 		pcb_layer_t *ly = pcb_uilayers.array[n];
-		lys_update_vis(*lys, ly->meta.real.vis);
+		if (ly != NULL)
+			lys_update_vis(*lys, ly->meta.real.vis);
 	}
 
 	/* update group open/close hides */