From 0f1c6708fdf17bb9c7305b8af5d12189956195b6 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 28 Sep 2019 15:24:00 +0200
Subject: [PATCH] patch 8.1.2091: double free when memory allocation fails

Problem:    Double free when memory allocation fails. (Zu-Ming Jiang)
Solution:   Use VIM_CLEAR() instead of vim_free(). (closes #4991)
---
 src/getchar.c | 4 ++--
 src/version.c | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/getchar.c b/src/getchar.c
index 1056e938ed..fcdc639688 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1296,11 +1296,11 @@ free_typebuf(void)
     if (typebuf.tb_buf == typebuf_init)
 	internal_error("Free typebuf 1");
     else
-	vim_free(typebuf.tb_buf);
+	VIM_CLEAR(typebuf.tb_buf);
     if (typebuf.tb_noremap == noremapbuf_init)
 	internal_error("Free typebuf 2");
     else
-	vim_free(typebuf.tb_noremap);
+	VIM_CLEAR(typebuf.tb_noremap);
 }
 
 /*
diff --git a/src/version.c b/src/version.c
index e595c7ab6e..2d9ffa3577 100644
--- a/src/version.c
+++ b/src/version.c
@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2091,
 /**/
     2090,
 /**/