From: Richard M. Stallman <rms@gnu.org>
Date: Mon, 11 May 1998 01:14:36 +0000 (+0000)
Subject: (Fset_buffer_multibyte): Error if marker is put
X-Git-Tag: emacs-20.3~1054
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=b69f979760fd5cabff5eb36171aefae3f933be2c;p=emacs.git

(Fset_buffer_multibyte): Error if marker is put
on buffer's marker-chain while we have temporarily put nil there.
---

diff --git a/src/buffer.c b/src/buffer.c
index e781d25646c..70cb13a9b75 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1822,6 +1822,12 @@ but the contents viewed as characters do change.")
 
 	  tail = XMARKER (tail)->chain;
 	}
+
+      /* Make sure no markers were put on the chain
+	 while the chain value was incorrect.  */
+      if (! EQ (BUF_MARKERS (current_buffer), Qnil))
+	abort ();
+
       BUF_MARKERS (current_buffer) = markers;
 
       /* Do this last, so it can calculate the new correspondences