From e064f427701e0a058f166c90bfb89f380d54c973 Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Wed, 20 Apr 2022 18:27:12 -0400
Subject: [PATCH] Don't consider buftype=acwrite buffers to have real filenames

Immediately after I changed this I rediscovered the documentation at
`:help E676`.
---
 plugin/fugitive.vim | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 8ef7b9d..8f2d4ff 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -23,9 +23,9 @@ function! FugitiveGitDir(...) abort
       return g:fugitive_event
     endif
     let dir = get(b:, 'git_dir', '')
-    if empty(dir) && (empty(bufname('')) || &buftype =~# '^\%(nofile\|quickfix\|terminal\|prompt\)$')
+    if empty(dir) && (empty(bufname('')) || &buftype =~# '^\%(nofile\|acwrite\|quickfix\|terminal\|prompt\)$')
       return FugitiveExtractGitDir(getcwd())
-    elseif (!exists('b:git_dir') || b:git_dir =~# s:bad_git_dir) && &buftype =~# '^\%(nowrite\|acwrite\)\=$'
+    elseif (!exists('b:git_dir') || b:git_dir =~# s:bad_git_dir) && &buftype =~# '^\%(nowrite\)\=$'
       let b:git_dir = FugitiveExtractGitDir(bufnr(''))
       return b:git_dir
     endif