commit https://github.com/vim/vim/commit/e0ab94e7123ca7855f45919114d948ef2bc1e8c3 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Sep 4 19:50:54 2016 +0200 patch 7.4.2324 Problem: Crash when editing a new buffer and BufUnload autocommand wipes out the new buffer. (Norio Takagi) Solution: Don't allow wiping out this buffer. (partly by Hirohito Higashi) Move old style test13 into test_autocmd. Avoid ml_get error when editing a file.

--- a/src/structs.h
+++ b/src/structs.h
@@ -1845,8 +1845,8 @@ struct file_buffer
 
     int		b_flags;	/* various BF_ flags */
 #ifdef FEAT_AUTOCMD
-    int		b_closing;	/* buffer is being closed, don't let
-				   autocommands close it too. */
+    int		b_locked;	/* Buffer is being closed or referenced, don't
+				   let autocommands wipe it out. */
 #endif
 
     /*