From: Eli Zaretskii <eliz@gnu.org>
Date: Mon, 4 Mar 2019 17:22:23 +0000 (+0200)
Subject: Avoid assertion violations in buf_bytepos_to_charpos
X-Git-Tag: emacs-27.0.90~3484
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=f06405cbf8dde232f8cbe9564a42613dae3dfdc5;p=emacs.git

Avoid assertion violations in buf_bytepos_to_charpos

* src/marker.c (buf_bytepos_to_charpos): Disable the assertion
regarding bytepos always at the head byte of a multibyte
sequence.
---

diff --git a/src/marker.c b/src/marker.c
index 0b2e1bf5c6b..6755993bfac 100644
--- a/src/marker.c
+++ b/src/marker.c
@@ -332,9 +332,11 @@ 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;