File _service:tar_scm:backport-CVE-2023-4734.patch of Package vim

From 4c6fe2e2ea62469642ed1d80b16d39e616b25cf5 Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Sat, 2 Sep 2023 19:30:03 +0200
Subject: [PATCH 21/52] patch 9.0.1846: [security] crash in fullcommand

Problem:  crash in fullcommand
Solution: Check for typeval correctly

Signed-off-by: Christian Brabandt <cb@256bit.org>
---
 src/ex_docmd.c                 | 2 +-
 src/testdir/test_functions.vim | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 32d52ab21..10d979d49 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -4047,7 +4047,7 @@ f_fullcommand(typval_T *argvars, typval_T *rettv)
 		|| check_for_opt_bool_arg(argvars, 1) == FAIL))
 	return;
 
-    name = argvars[0].vval.v_string;
+    name = tv_get_string(&argvars[0]);
     if (name == NULL)
 	return;
 
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 0eda5de38..ab1dbf3b5 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -2962,4 +2962,9 @@ func Test_virtcol()
   bwipe!
 endfunc
 
+func Test_fullcommand()
+  " this used to crash vim
+  call assert_equal('', fullcommand(10))
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
-- 
2.33.0