Index: trunk/src_3rd/rnd_inclib/dialogs/dlg_library_param.c
===================================================================
--- trunk/src_3rd/rnd_inclib/dialogs/dlg_library_param.c	(revision 37284)
+++ trunk/src_3rd/rnd_inclib/dialogs/dlg_library_param.c	(revision 37285)
@@ -493,6 +493,8 @@
 
 	if (filter_txt == NULL) {
 		filter_txt = ctx->example;
+		if (filter_txt == NULL) /* when there's no example; also happens when the script failed with syntax error */
+			return -1;
 		library_set_filter(ctx->lib_ctx, filter_txt);
 	}