From 48689a972d41256b423aa635dff689868a48e5bd Mon Sep 17 00:00:00 2001
From: Shougo Matsushita <Shougo.Matsu@gmail.com>
Date: Mon, 4 May 2015 16:26:59 +0900
Subject: [PATCH] Fix #273 check modifiable in :NeoSnippetClearMarkers

---
 autoload/neosnippet/commands.vim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/autoload/neosnippet/commands.vim b/autoload/neosnippet/commands.vim
index f80b826..fdb4ab8 100644
--- a/autoload/neosnippet/commands.vim
+++ b/autoload/neosnippet/commands.vim
@@ -137,7 +137,8 @@ function! neosnippet#commands#_clear_markers() "{{{
   let expand_stack = neosnippet#variables#expand_stack()
 
   " Get patterns and count.
-  if empty(expand_stack)
+  if !&l:modifiable
+        \ || empty(expand_stack)
         \ || neosnippet#variables#current_neosnippet().trigger
     return
   endif