From 10ed70a9c23cdd1748444e89e4928282e510451d Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Mon, 31 May 2021 19:35:26 -0400
Subject: [PATCH] Don't call exists() on invalid function name

References: https://github.com/tpope/vim-fugitive/issues/1751
---
 autoload/fugitive.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index 26f1637..516610f 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -2861,7 +2861,7 @@ function! fugitive#Command(line1, line2, range, bang, mods, arg) abort
   let name = substitute(get(args, 0, ''), '\%(^\|-\)\(\l\)', '\u\1', 'g')
   let git = s:UserCommandList()
   let options = {'git': git, 'dir': dir, 'flags': flags}
-  if pager is# -1 && exists('*s:' . name . 'Subcommand') && get(args, 1, '') !=# '--help'
+  if pager is# -1 && name =~# '^\a\+$' && exists('*s:' . name . 'Subcommand') && get(args, 1, '') !=# '--help'
     try
       let overrides = s:{name}Subcommand(a:line1, a:line2, a:range, a:bang, a:mods, extend({'subcommand': args[0], 'subcommand_args': args[1:-1]}, options))
       if type(overrides) == type('')