go get github.com/pingcap/parser died！ #1156

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   If possible, provide a recipe for reproducing the error.
   go get github.com/pingcap/parser

2. What did you expect to see?
   cd .; git clone -- https://github.com/pingcap/parser /root/go/src/github.com/pingcap/parser
   error: RPC failed; result=18, HTTP code = 200
   fatal: The remote end hung up unexpectedly
   fatal: early EOF
   fatal: index-pack failed
   package github.com/pingcap/parser: exit status 128

3. What did you see instead?

4. What version of TiDB SQL Parser are you using?

你好，我直接go get报了这个错，因为go-es-mysql调用了您这个库，您这个报错导致go-es那边也挂了，不知道怎么解决