From 8376227c9d5f9cfdc85a9b228997a1644176eb37 Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Sun, 11 Feb 2024 12:31:10 -0500
Subject: [PATCH] Avoid tabpagenr('#') on Vim versions without it

References: https://github.com/tpope/vim-fugitive/pull/2262
---
 autoload/fugitive.vim | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index 6f924b3..cb6ae9e 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -4368,13 +4368,15 @@ function! fugitive#DidChange(...) abort
   if a:0 > 1 ? a:2 : (!a:0 || a:1 isnot# 0)
     let t = reltime()
     let t:fugitive_reload_status = t
-    let prevnr = tabpagenr('#')
+    let prevnr = has('patch-8.2.1401') ? tabpagenr('#') : 0
     for tabnr in range(1, tabpagenr('$'))
       if tabnr != prevnr
         call settabvar(tabnr, 'fugitive_reload_status', t)
       endif
     endfor
-    call settabvar(prevnr, 'fugitive_reload_status', t)
+    if prevnr
+      call settabvar(prevnr, 'fugitive_reload_status', t)
+    endif
     call s:ReloadTabStatus()
   else
     call s:ReloadWinStatus()