patch 8.2.2476: using freed memory when splitting window while closing buffer Commit: https://github.com/vim/vim/commit/983d83ff1cd796ff321074335fa53fbe7ac45a46 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 7 12:12:43 2021 +0100 patch 8.2.2476: using freed memory when splitting window while closing buffer Problem: Using freed memory when using an autocommand to split a window while a buffer is being closed. Solution: Disallow splitting when the buffer has b_locked_split set.

--- a/src/structs.h
+++ b/src/structs.h
@@ -2633,6 +2633,8 @@ struct file_buffer
     int		b_flags;	// various BF_ flags
     int		b_locked;	// Buffer is being closed or referenced, don't
 				// let autocommands wipe it out.
+    int		b_locked_split;	// Buffer is being closed, don't allow opening
+				// a new window with it.
 
     /*
      * b_ffname has the full path of the file (NULL for no name).