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vim-patch:9.2.0874: fold size is compared against 'foldminlines' of the wrong window (#41051)

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Problem:  checkSmall() compares the fold size of window "wp" against
          the current window's 'foldminlines'.  A fold of another
          window, e.g. measured while it is redrawn, is judged by an
          unrelated option value.
Solution: Use 'foldminlines' of the window containing the fold
          (Igor Mikushkin).

closes: vim/vim#20864

773dc19f14

Co-authored-by: Igor Mikushkin <igor.mikushkin@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>
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zeertzjq 2026-07-30 06:19:12 +08:00 committed by GitHub
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38
test/old/testdir/test_fold.vim
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@ -1935,4 +1935,42 @@ func Test_cursor_fold_marker_undo()
bwipe!
endfunc
" The fold size must be compared against 'foldminlines' of the window that
" contains the fold, not of the current window.
func Test_foldminlines_per_window()
" Window with 'foldminlines'=5: its two-line fold stays displayed open.
new
setlocal foldenable foldmethod=manual foldminlines=5
call setline(1, ['one', 'two', 'three', 'four'])
2,3fold
call assert_equal(-1, foldclosed(2))
let winid = win_getid()
" Split; only the new current window gets 'foldminlines'=0. setline()
" invalidates the fold sizes of both windows and measures them again right
" away, the other window's while this window is current. win_execute()
" below only reads that cached verdict, without measuring again.
split
setlocal foldminlines=0
call setline(2, 'changed')
call assert_equal(2, foldclosed(2))
call win_execute(winid, 'call assert_equal(-1, foldclosed(2))')
bwipe!
" The same the other way around: 'foldminlines'=0 in the other window, so
" its fold must remain closed while the current window has a higher value.
new
setlocal foldenable foldmethod=manual foldminlines=0
call setline(1, ['one', 'two', 'three', 'four'])
2,3fold
call assert_equal(2, foldclosed(2))
let winid = win_getid()
split
setlocal foldminlines=5
call setline(2, 'changed')
call assert_equal(-1, foldclosed(2))
call win_execute(winid, 'call assert_equal(2, foldclosed(2))')
bwipe!
endfunc
" vim: shiftwidth=2 sts=2 expandtab