# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1562616904 -7200
# Node ID d04de6c49f59969979870a4ee5bb8ac35991f1ee
# Parent  e62f7f537c87cde34ebe19c4055f7bb738b6b2df
patch 8.1.1653: ubsan warns for possibly passing NULL pointer

commit https://github.com/vim/vim/commit/0d07155c8bbaca1a527b79da358438253a60839f
Author: Bram Moolenaar <Bram@vim.org>
Date:   Mon Jul 8 22:04:03 2019 +0200

    patch 8.1.1653: ubsan warns for possibly passing NULL pointer

    Problem:    Ubsan warns for possibly passing NULL pointer.
    Solution:   Skip code when length is zero. (Dominique Pelle, closes https://github.com/vim/vim/issues/4631)

diff --git a/src/channel.c b/src/channel.c
--- a/src/channel.c
+++ b/src/channel.c
@@ -3990,7 +3990,7 @@ channel_send(
 		    writeq_T *last = wq->wq_prev;
 
 		    /* append to the last entry */
-		    if (ga_grow(&last->wq_ga, len) == OK)
+		    if (len > 0 && ga_grow(&last->wq_ga, len) == OK)
 		    {
 			mch_memmove((char *)last->wq_ga.ga_data
 							  + last->wq_ga.ga_len,
@@ -4012,7 +4012,7 @@ channel_send(
 			    wq->wq_prev->wq_next = last;
 			wq->wq_prev = last;
 			ga_init2(&last->wq_ga, 1, 1000);
-			if (ga_grow(&last->wq_ga, len) == OK)
+			if (len > 0 && ga_grow(&last->wq_ga, len) == OK)
 			{
 			    mch_memmove(last->wq_ga.ga_data, buf, len);
 			    last->wq_ga.ga_len = len;
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1653,
+/**/
     1652,
 /**/
     1651,