# HG changeset patch
# User Boris Feld <boris.feld@octobus.net>
# Date 2018-12-14 16:23:41
# Node ID b54727f825118b79ee5ca0a367c0c02bdbd7c3f2
# Parent  43974cd4496798fd21de45c984469546ed515046

sparse-revlog: handle nullrev in index_get_start

The more generic index_get method handle nullrev fine, we apply the same logic
here.

diff --git a/mercurial/cext/revlog.c b/mercurial/cext/revlog.c
--- a/mercurial/cext/revlog.c
+++ b/mercurial/cext/revlog.c
@@ -225,6 +225,9 @@ int HgRevlogIndex_GetParents(PyObject *o
 static inline int64_t index_get_start(indexObject *self, Py_ssize_t rev)
 {
 	uint64_t offset;
+	if (rev == nullrev) {
+		return 0;
+	}
 	if (rev >= self->length) {
 		PyObject *tuple;
 		PyObject *pylong;