From ebe4fd5332fcde021f456eec9191c7206e7b7c8d Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Mon, 5 Nov 2018 21:03:21 +0100
Subject: [PATCH] control.c, bug 374, prevent crash if cend[stackp] is NULL
 reported by  PyroPeter

---
 src/frontend/control.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frontend/control.c b/src/frontend/control.c
index c82a5ab3b..6e591b52f 100644
--- a/src/frontend/control.c
+++ b/src/frontend/control.c
@@ -639,7 +639,7 @@ cp_evloop(char *string)
     for (;;) {
         freewl = wlist = getcommand(string);
         if (wlist == NULL) {    /* End of file or end of user input. */
-            if (cend[stackp]->co_parent && !string) {
+            if (cend[stackp] && cend[stackp]->co_parent && !string) {
                 cp_resetcontrol();
                 continue;
             } else {