From 76b9af849ba1c93eb2b6807e57268b7a7a2e205c Mon Sep 17 00:00:00 2001
From: Leonardo Taccari <iamleot@gmail.com>
Date: Thu, 17 Aug 2017 19:42:48 -0400
Subject: [PATCH] mhical expected an ics file as input and after just pressing
 ^D I've found that mhical wasn't happy about an empty input. A trivial patch
 that should fix this issue.

---
 test/mhical/test-mhical | 5 +++++
 uip/mhical.c            | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/test/mhical/test-mhical b/test/mhical/test-mhical
index 930c35f6..ad51b09c 100755
--- a/test/mhical/test-mhical
+++ b/test/mhical/test-mhical
@@ -874,5 +874,10 @@ check "$expected" "$actual"
 check "$expected_err" "$actual_err"
 
 
+# check null input
+start_test "null input"
+check_exit '-eq 0' mhical </dev/null
+
+
 finish_test
 exit $failed
diff --git a/uip/mhical.c b/uip/mhical.c
index 650b9821..1567d3af 100644
--- a/uip/mhical.c
+++ b/uip/mhical.c
@@ -714,7 +714,7 @@ display (FILE *file, contentline *clines, char *nfs) {
     }
 
     /* Don't call on the END:VCALENDAR line. */
-    if (clines->next) {
+    if (clines  &&  clines->next) {
       (void) fmt_scan (fmt, buffer, INT_MAX, dat, NULL);
       fputs (charstring_buffer (buffer), file);
       fmt_free (fmt, 1);
-- 
2.56.0