From fa3136e07148ab37fabc52007f531e71e41a1d5a Mon Sep 17 00:00:00 2001
From: Eli Zaretskii <eliz@gnu.org>
Date: Mon, 23 Apr 2018 20:48:12 +0300
Subject: [PATCH] Fix recent change in lread.c

* src/lread.c (openp): Avoid assertion violations in XCDR when
PATH is nil.  (Bug#31229)
---
 src/lread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lread.c b/src/lread.c
index 69b53629ec1..b8db117c79c 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -1772,7 +1772,7 @@ openp (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes,
 	      }
 	  }
       }
-    if (absolute)
+    if (absolute || NILP (path))
       break;
     path = XCDR (path);
   } while (CONSP (path));