From 32d37ede49583bb1adae16ec69d3ae5d5816637a Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Sat, 6 Jan 2018 21:48:19 -0800
Subject: [PATCH] [emacs] Add cquery-extra-init-params

To enable SerializeFormat::MessagePack and use .mpack cache files:

    (setq cquery-extra-init-params '(:cacheFormat 1))
---
 src/serializer.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/serializer.cc b/src/serializer.cc
index d684c6fc..f5a4328d 100644
--- a/src/serializer.cc
+++ b/src/serializer.cc
@@ -245,6 +245,8 @@ std::unique_ptr<IndexFile> Deserialize(SerializeFormat format,
     }
 
     case SerializeFormat::MessagePack: {
+      if (serialized.empty())
+        return nullptr;
       try {
         msgpack::object_handle oh =
             msgpack::unpack(serialized.data(), serialized.size());