From dc491c3df305a73908fe8de20b7c428a5b38c846 Mon Sep 17 00:00:00 2001
From: Martin Rudalics <rudalics@gmx.at>
Date: Mon, 22 Aug 2016 08:33:48 +0200
Subject: [PATCH] Fix (next-frame nil t) crash (Bug#24281)

* src/frame.c (candidate_frame): Check minibuf argument before
comparing it to zero (Bug#24281).
---
 src/frame.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frame.c b/src/frame.c
index e17c8acfc3c..2dbbb37289b 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -1310,7 +1310,7 @@ candidate_frame (Lisp_Object candidate, Lisp_Object frame, Lisp_Object minibuf)
 		     FRAME_FOCUS_FRAME (c)))
 	    return candidate;
 	}
-      else if (XFASTINT (minibuf) == 0)
+      else if (INTEGERP (minibuf) && XINT (minibuf) == 0)
 	{
 	  if (FRAME_VISIBLE_P (c) || FRAME_ICONIFIED_P (c))
 	    return candidate;
-- 
2.11.4.GIT