vim-patch:8.2.4403: ml_get error with nested folds and deleting lines

Problem:    ml_get error with nested folds and deleting lines.
Solution:   Correct the last line number before calling hasFoldingWin().
https://github.com/vim/vim/commit/943773783384a5ff63f57769d37ddabf8156fe1e

1 files changed, 5 insertions, 4 deletions

diff --git a/src/nvim/change.c b/src/nvim/change.c
index 6ac759d5e0..736867b6d3 100644
--- a/src/nvim/change.c
+++ b/src/nvim/change.c
@@ -223,19 +223,20 @@ static void changed_common(linenr_T lnum, colnr_T col, linenr_T lnume, long xtra
       // values for the cursor.
       // Update the folds for this window.  Can't postpone this, because
       // a following operator might work on the whole fold: ">>dd".
-      foldUpdate(wp, lnum, lnume + xtra - 1);
+      linenr_T last = lnume + xtra - 1;  // last line after the change
+      foldUpdate(wp, lnum, last);
 
       // The change may cause lines above or below the change to become
       // included in a fold.  Set lnum/lnume to the first/last line that
       // might be displayed differently.
       // Set w_cline_folded here as an efficient way to update it when
-      // inserting lines just above a closed fold. */
+      // inserting lines just above a closed fold.
       bool folded = hasFoldingWin(wp, lnum, &lnum, NULL, false, NULL);
       if (wp->w_cursor.lnum == lnum) {
         wp->w_cline_folded = folded;
       }
-      folded = hasFoldingWin(wp, lnume, NULL, &lnume, false, NULL);
-      if (wp->w_cursor.lnum == lnume) {
+      folded = hasFoldingWin(wp, last, NULL, &last, false, NULL);
+      if (wp->w_cursor.lnum == last) {
         wp->w_cline_folded = folded;
       }