commit https://github.com/vim/vim/commit/11fbc2866ccc11b4dd1726abdaf582a78ef3f743 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Sep 2 21:48:32 2016 +0200 patch 7.4.2309 Problem: Crash when doing tabnext in a BufUnload autocmd. (Dominique Pelle) Solution: When detecting that the tab page changed, don't just abort but delete the window where w_buffer is NULL.

--- a/src/version.c
+++ b/src/version.c
@@ -764,6 +764,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2309,
+/**/
     2308,
 /**/
     2307,