# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1665225006 -7200
# Node ID e1fbb6571b58485fc1b88adcf1c0971b6fe6ef96
# Parent  e81606c178f2c04f067f94690be266dd0859cce0
patch 9.0.0690: buffer size for expanding tab not correctly computed

Commit: https://github.com/vim/vim/commit/a0789478f6ebbb823670b7e14ce13ea3fd3b0217
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sat Oct 8 11:16:40 2022 +0100

    patch 9.0.0690: buffer size for expanding tab not correctly computed

    Problem:    Buffer size for expanding tab not correctly computed.
    Solution:   Correctly use size of end character.

diff --git a/src/drawline.c b/src/drawline.c
--- a/src/drawline.c
+++ b/src/drawline.c
@@ -2805,9 +2805,10 @@ win_line(
 			// If wlv.n_extra > 0, it gives the number of chars, to
 			// use for a tab, else we need to calculate the width
 			// for a tab.
-			len = (tab_len * mb_char2len(wp->w_lcs_chars.tab2));
+			int tab2_len = mb_char2len(wp->w_lcs_chars.tab2);
+			len = tab_len * tab2_len;
 			if (wp->w_lcs_chars.tab3)
-			    len += mb_char2len(wp->w_lcs_chars.tab3);
+			    len += mb_char2len(wp->w_lcs_chars.tab3) - tab2_len;
 			if (wlv.n_extra > 0)
 			    len += wlv.n_extra - tab_len;
 			c = wp->w_lcs_chars.tab1;
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    690,
+/**/
     689,
 /**/
     688,