From 9c5df0ae70c3a52c921920f097bb15aca6ceea5f Mon Sep 17 00:00:00 2001
From: Andrew Moore <alm@FreeBSD.org>
Date: Mon, 16 Aug 1993 09:30:18 +0000
Subject: [PATCH] Nullify pattern after failed regcomp

---
 bin/ed/re.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bin/ed/re.c b/bin/ed/re.c
index 3fad099c9437..2bf12219f8d8 100644
--- a/bin/ed/re.c
+++ b/bin/ed/re.c
@@ -86,7 +86,8 @@ optpat()
 	patlock = 0;
 	if (n = regcomp(exp, exps, 0)) {
 		regerror(n, exp, errmsg, sizeof errmsg);
-		return NULL;
+		free(exp);
+		return exp = NULL;
 	}
 	return exp;
 }