From d73cfefed5e45fec91a422cd87054611ff711b30 Mon Sep 17 00:00:00 2001
From: tao <2471314@gmail.com>
Date: Fri, 22 Aug 2025 10:55:45 +0800
Subject: fix(folds): error when deleting lines at end of buffer #35396

Problem:
with `foldmethod=expr foldexpr=v:lua.vim.treesitter.foldexpr()
foldminlines=0`, deleting lines at the end of the buffer always
reports an invalid top error, because the top value (i.e. the
start line number of the deletion) is always 1 greater than
the total line number of the modified buffer.

Solution:
remove the ml_line_count validation
---
 src/nvim/lua/stdlib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/nvim/lua')

diff --git a/src/nvim/lua/stdlib.c b/src/nvim/lua/stdlib.c
index 4a3b8596b3..a57ca059b7 100644
--- a/src/nvim/lua/stdlib.c
+++ b/src/nvim/lua/stdlib.c
@@ -563,7 +563,7 @@ static int nlua_foldupdate(lua_State *lstate)
   }
   // input is zero-based end-exclusive range
   linenr_T top = (linenr_T)luaL_checkinteger(lstate, 2) + 1;
-  if (top < 1 || top > win->w_buffer->b_ml.ml_line_count) {
+  if (top < 1) {
     return luaL_error(lstate, "invalid top");
   }
   linenr_T bot = (linenr_T)luaL_checkinteger(lstate, 3);
-- 
cgit