From e4671eaf9ea6eaed6362675a6953e322c8bb1115 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Fri, 18 Jul 2014 01:27:41 +0900
Subject: [PATCH] Do not assume that `frozen` key exists

To avoid possible error after PlugUpgrade
---
 plug.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plug.vim b/plug.vim
index 7f91ecb..ea5dfee 100644
--- a/plug.vim
+++ b/plug.vim
@@ -455,7 +455,7 @@ function! s:update_impl(pull, args) abort
                   \ remove(args, -1) : get(g:, 'plug_threads', 16)
 
   let managed = filter(copy(g:plugs), 's:is_managed(v:key)')
-  let todo = empty(args) ? filter(managed, '!v:val.frozen') :
+  let todo = empty(args) ? filter(managed, '!get(v:val, "frozen", 0)') :
                          \ filter(managed, 'index(args, v:key) >= 0')
 
   if empty(todo)