From 858b8de3d70fe76a3637c281bc2c8e3a6d961a2c Mon Sep 17 00:00:00 2001
From: Bart Schaefer <schaefer@zsh.org>
Date: Sat, 22 Apr 2023 14:40:23 -0700
Subject: 51670: prevent possible underflow in gettext()

---
 Src/text.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Src/text.c')

diff --git a/Src/text.c b/Src/text.c
index 56127c457..8b1bd96b6 100644
--- a/Src/text.c
+++ b/Src/text.c
@@ -335,7 +335,7 @@ getjobtext(Eprog prog, Wordcode c)
     tlim = tptr + JOBTEXTSIZE - 1;
     tjob = 1;
     gettext2(&s);
-    if (tptr[-1] == Meta)
+    if (tptr > jbuf && tptr[-1] == Meta)
 	--tptr;
     *tptr = '\0';
     freeeprog(prog);		/* mark as unused */
-- 
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