From d63c3d9d105b7d81ad397e784b33d3dec7073338 Mon Sep 17 00:00:00 2001
From: Paul Rigge <rigge@berkeley.edu>
Date: Sat, 30 Dec 2017 20:53:01 -0800
Subject: [PATCH] Add assertion in set_var_lval for null pointer.

If the lval is a index into a list, li should not be null.
---
 src/nvim/eval.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 33f8ffb738..f30840041b 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -2417,6 +2417,7 @@ static void set_var_lval(lval_T *lp, char_u *endp, typval_T *rettv,
       if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1)) {
         break;
       }
+      assert(lp->ll_li != NULL);
       if (TV_LIST_ITEM_NEXT(lp->ll_list, lp->ll_li) == NULL) {
         // Need to add an empty item.
         tv_list_append_number(lp->ll_list, 0);