Commit: patch 9.1.1955: sort() does not handle large numbers correctly

[Christian Brabandt]

patch 9.1.1955: sort() does not handle large numbers correctly

Commit: https://github.com/vim/vim/commit/04794efe12863eb96a489531c299879e6c8d15d4
Author: Yegappan Lakshmanan <yega...@yahoo.com>
Date: Sat Dec 6 10:22:07 2025 +0100

patch 9.1.1955: sort() does not handle large numbers correctly

Problem: sort() does not handle large numbers correctly
(Igbanam Ogbuluijah)
Solution: Don't truncate the return value of tv_get_number_chk()
(Yegappan Lakshmanan)

closes: #18868

Signed-off-by: Yegappan Lakshmanan <yega...@yahoo.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/list.c b/src/list.c
index f8c365af8..7d6793c59 100644
--- a/src/list.c
+++ b/src/list.c
@@ -2083,11 +2083,10 @@ item_compare2(const void *s1, const void *s2)
res = ITEM_COMPARE_FAIL;
else
{
- res = (int)tv_get_number_chk(&rettv, &sortinfo->item_compare_func_err);
- if (res > 0)
- res = 1;
- else if (res < 0)
- res = -1;
+ varnumber_T n;
+
+ n = tv_get_number_chk(&rettv, &sortinfo->item_compare_func_err);
+ res = (n > 0) ? 1 : (n < 0) ? -1 : 0;
}
if (sortinfo->item_compare_func_err)
res = ITEM_COMPARE_FAIL; // return value has wrong type
diff --git a/src/testdir/test_sort.vim b/src/testdir/test_sort.vim
index 60b021242..39c4114f0 100644
--- a/src/testdir/test_sort.vim
+++ b/src/testdir/test_sort.vim
@@ -1,5 +1,7 @@
" Tests for the "sort()" function and for the ":sort" command.

+import './util/vim9.vim' as v9
+
func Compare1(a, b) abort
call sort(range(3), 'Compare2')
return a:a - a:b
@@ -1557,4 +1559,30 @@ func Test_sort_using_dict_func()
delfunc DictSort
endfunc

+" Test for using sort() function with a funcref and large numbers
+func Test_sort_funcref_with_large_number()
+ let lines =<< trim END
+ call assert_equal(
+ \ [
+ \ (188325333471071, 188931909913550),
+ \ (229539777187355, 229539777187355),
+ \ (245727634348687, 249469249579525),
+ \ (264028451845520, 265514296554744),
+ \ (375117820166731, 378942174241518),
+ \ (487766135067138, 491977135306566),
+ \ (535474757750378, 535849288071548)
+ \ ],
+ \ [
+ \ (229539777187355, 229539777187355),
+ \ (487766135067138, 491977135306566),
+ \ (188325333471071, 188931909913550),
+ \ (264028451845520, 265514296554744),
+ \ (245727634348687, 249469249579525),
+ \ (375117820166731, 378942174241518),
+ \ (535474757750378, 535849288071548)
+ \ ]->sort(LSTART a, b LMIDDLE a[0] - b[0] LEND))
+ END
+ call v9.CheckSourceLegacyAndVim9Success(lines)
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index bb964b62a..3df7fce94 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1955,
/**/
1954,
/**/