From 1e755064e9ffedccb90b1de19de3db507ab84ac1 Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Tue, 6 Oct 2015 20:33:41 -0400
Subject: [PATCH] Better error on :Gwrite failure

References https://github.com/tpope/vim-fugitive/issues/696
---
 plugin/fugitive.vim | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 60e27c4..d667100 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -1461,6 +1461,9 @@ function! s:Write(force,...) abort
   let mytab = tabpagenr()
   let mybufnr = bufnr('')
   let path = a:0 ? join(a:000, ' ') : s:buffer().path()
+  if empty(path)
+    return 'echoerr '.string('fugitive: cannot determine file path')
+  endif
   if path =~# '^:\d\>'
     return 'write'.(a:force ? '! ' : ' ').s:fnameescape(s:repo().translate(s:buffer().expand(path)))
   endif