We should check we resolved a service before stating it's existance.

src/librc/librc-depend.c

@@ -283,6 +283,7 @@ static char **get_provided (const rc_depinfo_t *deptree,
 
 	if (! deptree || ! depinfo)
 		return (NULL);
+	
 	if (rc_service_exists (depinfo->service))
 		return (NULL);
 

src/librc/librc.c

@@ -289,7 +289,9 @@ bool rc_service_exists (const char *service)
 		service[len - 1] == 'h')
 		return (false);
 
-	file = rc_service_resolve (service);
+	if (! (file = rc_service_resolve (service)))
+		return (false);
+
 	if (stat (file, &buf) == 0 && buf.st_mode & S_IXUGO)
 		retval = true;
 	free (file);