From: Eli Zaretskii <eliz@gnu.org>
Date: Tue, 5 Mar 2019 16:25:23 +0000 (+0200)
Subject: Remove unreliable assertion in buf_bytepos_to_charpos
X-Git-Tag: emacs-27.0.90~3477
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=1c349c62305d432abf0fa2b6e3f5d754fe4cab79;p=emacs.git

Remove unreliable assertion in buf_bytepos_to_charpos

* src/marker.c (buf_bytepos_to_charpos): Remove the assertion
regarding bytepos always at the head byte of a multibyte
sequence.  For the reasons, see
http://lists.gnu.org/archive/html/emacs-devel/2019-03/msg00100.html
http://lists.gnu.org/archive/html/emacs-devel/2019-03/msg00102.html
---

diff --git a/src/marker.c b/src/marker.c
index 6755993bfac..b58051a8c2b 100644
--- a/src/marker.c
+++ b/src/marker.c
@@ -332,12 +332,6 @@ buf_bytepos_to_charpos (struct buffer *b, ptrdiff_t bytepos)
   if (best_above == best_above_byte)
     return bytepos;
 
-#if 0
-  /* Check bytepos is not in the middle of a character. */
-  eassert (bytepos >= BUF_Z_BYTE (b)
-           || CHAR_HEAD_P (BUF_FETCH_BYTE (b, bytepos)));
-#endif
-
   best_below = BEG;
   best_below_byte = BEG_BYTE;