From 110b13e1090bc31ac1352b28adc2d02b6d25a102 Mon Sep 17 00:00:00 2001
From: Joey Pabalinas <joeypabalinas@gmail.com>
Date: Tue, 23 Jan 2018 22:28:08 -0800
Subject: 42313: avoid null-pointer deref when using ${(PA)...} on an empty
 array result

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

(limited to 'Src/subst.c')

diff --git a/Src/subst.c b/Src/subst.c
index d027e3d83..a265a187e 100644
--- a/Src/subst.c
+++ b/Src/subst.c
@@ -2430,7 +2430,7 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags,
 		val = aval[0];
 		isarr = 0;
 	    }
-	    s = dyncat(val, s);
+	    s = val ? dyncat(val, s) : dupstring(s);
 	    /* Now behave po-faced as if it was always like that... */
 	    subexp = 0;
 	    /*
-- 
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