From 2d33a766a17b7304686fc00eec2b2e0ce49400ba Mon Sep 17 00:00:00 2001
From: Jaehwang Jung <tomtomjhj@gmail.com>
Date: Tue, 12 Dec 2023 12:08:25 +0900
Subject: [PATCH] fix(extmarks): `U` changed_bytes after extmark_splice
 (#26501)

See also: https://github.com/neovim/neovim/pull/26364
---
 src/nvim/undo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nvim/undo.c b/src/nvim/undo.c
index 928dd2967c..fd3bb41de0 100644
--- a/src/nvim/undo.c
+++ b/src/nvim/undo.c
@@ -3031,9 +3031,9 @@ void u_undoline(void)
 
   char *oldp = u_save_line(curbuf->b_u_line_lnum);
   ml_replace(curbuf->b_u_line_lnum, curbuf->b_u_line_ptr, true);
-  changed_bytes(curbuf->b_u_line_lnum, 0);
   extmark_splice_cols(curbuf, (int)curbuf->b_u_line_lnum - 1, 0, (colnr_T)strlen(oldp),
                       (colnr_T)strlen(curbuf->b_u_line_ptr), kExtmarkUndo);
+  changed_bytes(curbuf->b_u_line_lnum, 0);
   xfree(curbuf->b_u_line_ptr);
   curbuf->b_u_line_ptr = oldp;