From 8979109a6fd76bf422bc10c043b39e6d5dc60c68 Mon Sep 17 00:00:00 2001
From: Lingchao Xin <douglarek@users.noreply.github.com>
Date: Thu, 23 Jan 2020 20:21:37 +0800
Subject: [PATCH] Fix fatal invalid reference for repos have no tags

---
 plug.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plug.vim b/plug.vim
index 78fdc03..fb7a1fd 100644
--- a/plug.vim
+++ b/plug.vim
@@ -1158,7 +1158,7 @@ function! s:update_finish()
       if has_key(spec, 'commit')
         call s:log4(name, 'Checking out '.spec.commit)
         let out = s:checkout(spec)
-      elseif has_key(spec, 'tag')
+      elseif has_key(spec, 'tag') && spec.tag
         let tag = spec.tag
         if tag =~ '\*'
           let tags = s:lines(s:system('git tag --list '.plug#shellescape(tag).' --sort -version:refname 2>&1', spec.dir))