# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1653147903 -7200
# Node ID ddbb36c1830b41ec486a2fbb6b2eff087da5dc46
# Parent  39709075cf96261be8216cca4a5a1e832de9a5fc
patch 8.2.4991: no test for hwat patch 8.1.0535 fixes

Commit: https://github.com/vim/vim/commit/93c1573dd284dc9cf5ed9265a0143aaf520d2920
Author: zeertzjq <zeertzjq@outlook.com>
Date:   Sat May 21 16:34:38 2022 +0100

    patch 8.2.4991: no test for hwat patch 8.1.0535 fixes

    Problem:    No test for hwat patch 8.1.0535 fixes.
    Solution:   Add a test. (closes https://github.com/vim/vim/issues/10462)

diff --git a/src/testdir/test_fold.vim b/src/testdir/test_fold.vim
--- a/src/testdir/test_fold.vim
+++ b/src/testdir/test_fold.vim
@@ -231,6 +231,26 @@ func Test_update_folds_expr_read()
   set foldmethod& foldexpr&
 endfunc
 
+" Test for what patch 8.1.0535 fixes.
+func Test_foldexpr_no_interrupt_addsub()
+  new
+  func! FoldFunc()
+    call setpos('.', getcurpos())
+    return '='
+  endfunc
+
+  set foldmethod=expr
+  set foldexpr=FoldFunc()
+  call setline(1, '1.2')
+
+  exe "norm! $\<C-A>"
+  call assert_equal('1.3', getline(1))
+
+  bwipe!
+  delfunc FoldFunc
+  set foldmethod& foldexpr&
+endfunc
+
 func Check_foldlevels(expected)
   call assert_equal(a:expected, map(range(1, line('$')), 'foldlevel(v:val)'))
 endfunc
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4991,
+/**/
     4990,
 /**/
     4989,