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vim-patch:8.2.4393: possible number overflow with nested folds (#21305)

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Problem:    Possible number overflow with nested folds.
Solution:   Avoid a negative line number.

6b43471da4

Co-authored-by: Bram Moolenaar <Bram@vim.org>
This commit is contained in:
zeertzjq
2022-12-06 11:34:20 +08:00
committed by GitHub
parent 9a6f481ca0
commit 6d7b94ea08
1 changed files with 4 additions and 6 deletions
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10
src/nvim/fold.c
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@@ -1436,15 +1436,13 @@ static void foldMarkAdjustRecurse(win_T *wp, garray_T *gap, linenr_T line1, line
// 5. fold is below line1 and contains line2; need to
// correct nested folds too
if (amount == MAXLNUM) {
foldMarkAdjustRecurse(wp, &fp->fd_nested, line1 - fp->fd_top,
line2 - fp->fd_top, amount,
amount_after + (fp->fd_top - top));
foldMarkAdjustRecurse(wp, &fp->fd_nested, 0, line2 - fp->fd_top,
amount, amount_after + (fp->fd_top - top));
fp->fd_len -= line2 - fp->fd_top + 1;
fp->fd_top = line1;
} else {
foldMarkAdjustRecurse(wp, &fp->fd_nested, line1 - fp->fd_top,
line2 - fp->fd_top, amount,
amount_after - amount);
foldMarkAdjustRecurse(wp, &fp->fd_nested, 0, line2 - fp->fd_top,
amount, amount_after - amount);
fp->fd_len += amount_after - amount;
fp->fd_top += amount;
}