From b79523681d2b7cf7e1c1f0b9174aa3804e1d5811 Mon Sep 17 00:00:00 2001
From: Jan Edmund Lazo <janedmundlazo@hotmail.com>
Date: Mon, 25 Jun 2018 11:40:04 -0400
Subject: [PATCH] vim-patch:8.0.0707: freeing wrong memory with certain
 autocommands

Problem:    Freeing wrong memory when manipulating buffers in autocommands.
            (James McCoy)
Solution:   Also set the w_s pointer if w_buffer was NULL.
https://github.com/vim/vim/commit/f1d13478e3a7e1a86d52552c8c5571f00dc28ad1
---
 src/nvim/ex_cmds.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nvim/ex_cmds.c b/src/nvim/ex_cmds.c
index dbf11514cf..15b49b69ce 100644
--- a/src/nvim/ex_cmds.c
+++ b/src/nvim/ex_cmds.c
@@ -2352,8 +2352,8 @@ int do_ecmd(
         } else {
           // <VN> We could instead free the synblock
           // and re-attach to buffer, perhaps.
-          if (curwin->w_buffer != NULL
-              && curwin->w_s == &(curwin->w_buffer->b_s)) {
+          if (curwin->w_buffer == NULL
+              || curwin->w_s == &(curwin->w_buffer->b_s)) {
             curwin->w_s = &(buf->b_s);
           }