diff -r f74557336910 src/lib-master/master-service-settings.c
--- a/src/lib-master/master-service-settings.c	Tue Jul 31 20:59:22 2012 +0300
+++ b/src/lib-master/master-service-settings.c	Wed Aug 01 22:54:29 2012 +0300
@@ -203,6 +203,7 @@
 	if (fd < 0) {
 		*error_r = t_strdup_printf("net_connect_unix(%s) failed: %m",
 					   path);
+		if (errno == EACCES && input->never_exec) i_panic("%s", *error_r);
 		config_exec_fallback(service, input);
 		return -1;
 	}