From edbc0d46cffe1766d0b330dc2842212cff644f8e Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 20 Aug 2017 16:11:51 +0200
Subject: [PATCH] patch 8.0.0975: using freed memory when setting 'backspace'

Problem:    Using freed memory when setting 'backspace'.
Solution:   When changing oldval also change origval.
---
 src/option.c  | 2 ++
 src/version.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/src/option.c b/src/option.c
index 48106411f..61d357983 100644
--- a/src/option.c
+++ b/src/option.c
@@ -4927,6 +4927,8 @@ do_set(
 					break;
 				}
 				vim_free(oldval);
+				if (origval == oldval)
+				    origval = *(char_u **)varp;
 				oldval = *(char_u **)varp;
 			    }
 			    /*
diff --git a/src/version.c b/src/version.c
index d5df16153..36af20968 100644
--- a/src/version.c
+++ b/src/version.c
@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    975,
 /**/
     974,
 /**/