# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1630605605 -7200
# Node ID 0612d28321e89e855ebef6a43d028e3e2d695246
# Parent  ebc29a793c7dda0a78cbc97385a10b43f5a729d8
patch 8.2.3396: when libcall() fails invalid pointer may be used

Commit: https://github.com/vim/vim/commit/87e1587b8add93e40340170e4261cdadc4c8940e
Author: Bram Moolenaar <Bram@vim.org>
Date:   Thu Sep 2 19:53:07 2021 +0200

    patch 8.2.3396: when libcall() fails invalid pointer may be used

    Problem:    When libcall() fails invalid pointer may be used.
    Solution:   Initialize the string to NULL. (Yasuhiro Matsumoto, closes https://github.com/vim/vim/issues/8829)

diff --git a/src/evalfunc.c b/src/evalfunc.c
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -6689,9 +6689,14 @@ libcall_common(typval_T *argvars UNUSED,
 	if (argvars[2].v_type == VAR_STRING)
 	    string_in = argvars[2].vval.v_string;
 	if (type == VAR_NUMBER)
+	{
 	    string_result = NULL;
+	}
 	else
+	{
+	    rettv->vval.v_string = NULL;
 	    string_result = &rettv->vval.v_string;
+	}
 	if (mch_libcall(argvars[0].vval.v_string,
 			     argvars[1].vval.v_string,
 			     string_in,
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3396,
+/**/
     3395,
 /**/
     3394,