From 55f04e49dcd8c78e2fee09159f8587ec6a9d160e Mon Sep 17 00:00:00 2001
From: hrsh7th <hrsh7th@gmail.com>
Date: Mon, 31 Jan 2022 14:30:57 +0900
Subject: [PATCH] Improve sync API

---
 lua/cmp/init.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lua/cmp/init.lua b/lua/cmp/init.lua
index e877100..dc8754e 100644
--- a/lua/cmp/init.lua
+++ b/lua/cmp/init.lua
@@ -33,7 +33,9 @@ cmp.mapping = require('cmp.config.mapping')
 cmp.sync = function(callback)
   return function(...)
     cmp.core.filter:sync(1000)
-    return callback(...)
+    if callback then
+      return callback(...)
+    end
   end
 end