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From dbdd16b62560413abcc3c8e893cc3010ccf31666 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 14 Aug 2022 21:46:07 +0100
Subject: [PATCH] patch 9.0.0212: invalid memory access when compiling :unlet
Problem: Invalid memory access when compiling :unlet.
Solution: Don't read past the end of the line.
---
diff --git a/src/vim9cmds.c b/src/vim9cmds.c
index 35a382138bf3..93032d6bf154 100644
--- a/src/vim9cmds.c
+++ b/src/vim9cmds.c
@@ -92,6 +92,12 @@ free_locals(cctx_T *cctx)
int
check_vim9_unlet(char_u *name)
{
+ if (*name == NUL)
+ {
+ semsg(_(e_argument_required_for_str), "unlet");
+ return FAIL;
+ }
+
if (name[1] != ':' || vim_strchr((char_u *)"gwtb", *name) == NULL)
{
// "unlet s:var" is allowed in legacy script.
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