index: drop support for nullid at position len(index) in index_node
I think no callers exist since at least a3dacabd476b (index: don't
allow index[len(index)] to mean nullid, 2018-07-20).
Differential Revision: https://phab.mercurial-scm.org/D4105
--- a/mercurial/cext/revlog.c Sat Aug 04 23:15:03 2018 -0700
+++ b/mercurial/cext/revlog.c Sat Aug 04 22:48:25 2018 -0700
@@ -228,10 +228,10 @@
Py_ssize_t length = index_length(self) + 1;
const char *data;
- if (pos == length - 1 || pos == -1)
+ if (pos == -1)
return nullid;
- if (pos >= length)
+ if (pos >= length - 1)
return NULL;
if (pos >= self->length - 1) {