From af043e12d9e5869c597de40b9a2517ae97ac72e7 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 2 Jul 2022 12:08:16 +0100
Subject: [PATCH] patch 9.0.0024: may access part of typeahead buf that isn't
 filled

Problem:    May access part of typeahead buf that isn't filled.
Solution:   Check length of typeahead.
---
 src/getchar.c | 3 ++-
  files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/getchar.c b/src/getchar.c
index 210a67acad59..12fd1c9146b3 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -2437,7 +2437,8 @@ handle_mapping(
     int		is_plug_map = FALSE;
 
     // If typehead starts with <Plug> then remap, even for a "noremap" mapping.
-    if (typebuf.tb_buf[typebuf.tb_off] == K_SPECIAL
+    if (typebuf.tb_len >= 3
+	    && typebuf.tb_buf[typebuf.tb_off] == K_SPECIAL
 	    && typebuf.tb_buf[typebuf.tb_off + 1] == KS_EXTRA
 	    && typebuf.tb_buf[typebuf.tb_off + 2] == KE_PLUG)
 	is_plug_map = TRUE;