From 12ae29ebfbb03d3856ca97ab0b555d58d11172b4 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Wed, 14 Jul 1993 16:36:25 +0000
Subject: [PATCH] (mark_object) [DEBUG_MOLE]: Add abort at beginning.

---
 src/alloc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/alloc.c b/src/alloc.c
index e6edea42c95..07775391bfb 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -1460,6 +1460,11 @@ mark_object (objptr)
 {
   register Lisp_Object obj;
 
+#ifdef DEBUG_MOLE
+  if (*(int *) ((char *)__builtin_frame_address (0) - 16) == 0)
+    abort ();
+#endif
+
   obj = *objptr;
   XUNMARK (obj);
 
-- 
2.39.5