From ceb46f002145e986c944b2423404535019b7e62b Mon Sep 17 00:00:00 2001
From: Philipp Stephani <phst@google.com>
Date: Wed, 12 Oct 2016 22:48:32 +0200
Subject: [PATCH] Fix crash in evaluating functions

See Bug#24673

* src/eval.c (funcall_lambda): Fix crash for bogus functions such
as (closure).
---
 src/eval.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/eval.c b/src/eval.c
index 13a41a2ae20..b94712d4579 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -2825,9 +2825,11 @@ funcall_lambda (Lisp_Object fun, ptrdiff_t nargs,
     {
       if (EQ (XCAR (fun), Qclosure))
 	{
-	  fun = XCDR (fun);	/* Drop `closure'.  */
+	  Lisp_Object cdr = XCDR (fun);	/* Drop `closure'.  */
+	  if (! CONSP (cdr))
+	    xsignal1 (Qinvalid_function, fun);
+	  fun = cdr;
 	  lexenv = XCAR (fun);
-	  CHECK_LIST_CONS (fun, fun);
 	}
       else
 	lexenv = Qnil;
-- 
2.39.2