Commit: patch 9.0.2159: screenpos() may crash with neg. column

[Christian Brabandt]

patch 9.0.2159: screenpos() may crash with neg. column

Commit: https://github.com/vim/vim/commit/ec54af4e26952d954a4cc009f62c80ea01445d30
Author: zeertzjq <zeer...@outlook.com>
Date: Tue Dec 12 16:43:44 2023 +0100

patch 9.0.2159: screenpos() may crash with neg. column

Problem: screenpos() may crash with neg. column
Solution: validate and correct column

closes: #13669

Signed-off-by: zeertzjq <zeer...@outlook.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/move.c b/src/move.c
index fbb352a32..861d84b84 100644
--- a/src/move.c
+++ b/src/move.c
@@ -1531,6 +1531,8 @@ f_screenpos(typval_T *argvars UNUSED, typval_T *rettv)
return;
}
pos.col = tv_get_number(&argvars[2]) - 1;
+ if (pos.col < 0)
+ pos.col = 0;
pos.coladd = 0;
textpos2screenpos(wp, &pos, &row, &scol, &ccol, &ecol);

diff --git a/src/testdir/test_cursor_func.vim b/src/testdir/test_cursor_func.vim
index 3cdf4cb7f..2bdda869e 100644
--- a/src/testdir/test_cursor_func.vim
+++ b/src/testdir/test_cursor_func.vim
@@ -206,6 +206,11 @@ func Test_screenpos()
nmenu WinBar.TEST :
call assert_equal(#{col: 1, row: 2, endcol: 1, curscol: 1}, screenpos(win_getid(), 1, 1))
nunmenu WinBar.TEST
+ call assert_equal(#{col: 1, row: 1, endcol: 1, curscol: 1}, screenpos(win_getid(), 1, 1))
+
+ call assert_equal(#{col: 0, row: 0, endcol: 0, curscol: 0}, screenpos(0, 0, 1))
+ call assert_equal(#{col: 0, row: 0, endcol: 0, curscol: 0}, screenpos(0, -1, 1))
+ call assert_equal(#{col: 1, row: 1, endcol: 1, curscol: 1}, screenpos(0, 1, -v:maxcol))
endfunc

func Test_screenpos_fold()
diff --git a/src/version.c b/src/version.c
index 4bb1c90ba..15ff51dd7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 2159,
/**/
2158,
/**/