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-rw-r--r--src/nvim/fold.c5
-rw-r--r--src/nvim/testdir/test_fold.vim20
2 files changed, 23 insertions, 2 deletions
diff --git a/src/nvim/fold.c b/src/nvim/fold.c
index 3643ceb460..e08d6d4a4e 100644
--- a/src/nvim/fold.c
+++ b/src/nvim/fold.c
@@ -1058,7 +1058,7 @@ void cloneFoldGrowArray(garray_T *from, garray_T *to)
// foldFind() {{{2
/// Search for line "lnum" in folds of growarray "gap".
-/// Set *fpp to the fold struct for the fold that contains "lnum" or
+/// Set "*fpp" to the fold struct for the fold that contains "lnum" or
/// the first fold below it (careful: it can be beyond the end of the array!).
///
/// @return false when there is no fold that contains "lnum".
@@ -2615,7 +2615,8 @@ static void foldSplit(buf_T *buf, garray_T *const gap, const int i, const linenr
// any between top and bot, they have been removed by the caller.
garray_T *const gap1 = &fp->fd_nested;
garray_T *const gap2 = &fp[1].fd_nested;
- if (foldFind(gap1, bot + 1 - fp->fd_top, &fp2)) {
+ (void)foldFind(gap1, bot + 1 - fp->fd_top, &fp2);
+ if (fp2 != NULL) {
const int len = (int)((fold_T *)gap1->ga_data + gap1->ga_len - fp2);
if (len > 0) {
ga_grow(gap2, len);
diff --git a/src/nvim/testdir/test_fold.vim b/src/nvim/testdir/test_fold.vim
index 6da1b3d4a0..9f5ad53adb 100644
--- a/src/nvim/testdir/test_fold.vim
+++ b/src/nvim/testdir/test_fold.vim
@@ -881,4 +881,24 @@ func Test_fold_relative_move()
set fdm& sw& wrap& tw&
endfunc
+" Make sure a fold containing a nested fold is split correctly when using
+" foldmethod=indent
+func Test_fold_split()
+ new
+ let lines =<< trim END
+ line 1
+ line 2
+ line 3
+ line 4
+ line 5
+ END
+ call setline(1, lines)
+ setlocal sw=2
+ setlocal foldmethod=indent foldenable
+ call assert_equal([0, 1, 1, 2, 2], range(1, 5)->map('foldlevel(v:val)'))
+ call append(2, 'line 2.5')
+ call assert_equal([0, 1, 0, 1, 2, 2], range(1, 6)->map('foldlevel(v:val)'))
+ bw!
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab