--- a/mercurial/cext/revlog.c	Fri Nov 02 21:25:35 2018 +0900
+++ b/mercurial/cext/revlog.c	Sun Oct 28 21:16:36 2018 +0900
@@ -2311,7 +2311,7 @@
 	/* to pass index_get_parents() */
 	int (*)(indexObject *, Py_ssize_t, int*, int),
 	/* intrevs vector */
-	int initrevslen, long *initrevs,
+	Py_ssize_t initrevslen, long *initrevs,
 	long stoprev,
 	int inclusive);
 void rustlazyancestors_drop(rustlazyancestorsObject *self);