patch 8.2.4428: crash when switching tabpage while in the cmdline window Commit: https://github.com/vim/vim/commit/0f6e28f686dbb59ab3b562408ab9b2234797b9b1 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 20 20:49:35 2022 +0000 patch 8.2.4428: crash when switching tabpage while in the cmdline window Problem: Crash when switching tabpage while in the cmdline window. Solution: Disallow switching tabpage when in the cmdline window.

--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -1,4 +1,5 @@
 /* window.c */
+win_T *prevwin_curwin(void);
 void do_window(int nchar, long Prenum, int xchar);
 void get_wincmd_addr_type(char_u *arg, exarg_T *eap);
 int win_split(int size, int flags);