From 263a0c247620f86532424727f7ed07ca7540fbf3 Mon Sep 17 00:00:00 2001
From: Peter Stephenson <pws@zsh.org>
Date: Tue, 9 May 2017 09:46:23 +0100
Subject: 41078: Empty psvar could cause bad dereference in prompt expansion

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

(limited to 'Src/prompt.c')

diff --git a/Src/prompt.c b/Src/prompt.c
index 29e006e0e..c478e69fb 100644
--- a/Src/prompt.c
+++ b/Src/prompt.c
@@ -399,7 +399,7 @@ putpromptchar(int doprint, int endchar, unsigned int *txtchangep)
 			test = 1;
 		    break;
 		case 'V':
-		    if (arrlen_ge(psvar, arg)) {
+		    if (psvar && *psvar && arrlen_ge(psvar, arg)) {
 			if (*psvar[(arg ? arg : 1) - 1])
 			    test = 1;
 		    }
-- 
cgit 1.4.1