From 001e312ba5e7972b403e6b403b78bd53c22d8b80 Mon Sep 17 00:00:00 2001
From: "Roland C. Dowdeswell" <roland.dowdeswell@twosigma.com>
Date: Thu, 21 Nov 2019 22:29:21 +0000
Subject: [PATCH] Make krb5_cc_close(ctx, NULL) stop SEGV'ing.

---
 lib/krb5/cache.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/krb5/cache.c b/lib/krb5/cache.c
index 709049c21..1da78e534 100644
--- a/lib/krb5/cache.c
+++ b/lib/krb5/cache.c
@@ -782,6 +782,9 @@ krb5_cc_close(krb5_context context,
 {
     krb5_error_code ret;
 
+    if (!id)
+	return 0;
+
     /*
      * We want to automatically acquire a PKIX credential using kx509.
      *