From 8ad2b96cdfda11070645f71b2d804466b750041d Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Tue, 21 Mar 2023 10:32:23 -0400
Subject: [PATCH] Guard against missing win_id2win on Vim 7.4

Resolves: https://github.com/tpope/vim-fugitive/issues/2136
---
 autoload/fugitive.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index ef7ab3d..10eb3fc 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -6806,7 +6806,7 @@ endfunction
 
 function! s:BlameLeave() abort
   let state = s:TempState()
-  let bufwinnr = win_id2win(get(state, 'origin_winid'))
+  let bufwinnr = exists('*win_id2win') ? win_id2win(get(state, 'origin_winid')) : 0
   if bufwinnr == 0
     let bufwinnr = bufwinnr(get(state, 'origin_bufnr', -1))
   endif