From 269c89ef598e6cd0fca57f5e1b9202bb86de2ca7 Mon Sep 17 00:00:00 2001
From: Eric Christopherson <echristopherson@gmail.com>
Date: Wed, 9 Apr 2014 21:55:34 -0500
Subject: [PATCH] Ignore E302 "Could not rename swap file" error

According to `:help E302`, E302 comes from Vim being unable to rename
the swap file when an open buffer's name is changed; but the error is
mostly harmless. E302 seems to occur in vim-fugitive under Windows but
not *nix.

This fix allow :Glog and :Gdiff to work on such systems; previously the
uncaught error made these operations fail or at least work strangely.
---
 plugin/fugitive.vim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index dabc613..9d8bcb7 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -2078,7 +2078,10 @@ function! s:ReplaceCmd(cmd,...) abort
   try
     silent edit!
   finally
-    silent exe 'keepalt file '.s:fnameescape(fn)
+    try
+      silent exe 'keepalt file '.s:fnameescape(fn)
+    catch /^Vim\%((\a\+)\)\=:E302/
+    endtry
     call delete(tmp)
     if fnamemodify(bufname('$'), ':p') ==# tmp
       silent execute 'bwipeout '.bufnr('$')