# HG changeset patch
# User Sergey Kandaurov <pluknet@nginx.com>
# Date 1528127274 -10800
# Node ID da9941c9b01bbc62c67961ca442f8bf1a7f23ce3
# Parent  bd6563e81cea2d584960c83b1587f4e35eae6d69
Leave chain in ngx_chain_add_copy() in consistent state on errors.

diff --git a/src/core/ngx_buf.c b/src/core/ngx_buf.c
--- a/src/core/ngx_buf.c
+++ b/src/core/ngx_buf.c
@@ -137,6 +137,7 @@ ngx_chain_add_copy(ngx_pool_t *pool, ngx
     while (in) {
         cl = ngx_alloc_chain_link(pool);
         if (cl == NULL) {
+            *ll = NULL;
             return NGX_ERROR;
         }