*: upgrade to go 1.12 (#9299)

.travis.yml

@@ -3,7 +3,7 @@ language: go
 go_import_path: github.com/pingcap/tidb
 
 go:
-  - "1.11.3"
+  - "1.12"
 
 env:
     - TRAVIS_COVERAGE=0
@@ -13,7 +13,7 @@ env:
 matrix:
   fast_finish: true
   allow_failures:
-    - go: "1.11.3"
+    - go: "1.12"
       env: TRAVIS_COVERAGE=1
 
 before_install:  

Dockerfile

@@ -1,5 +1,5 @@
 # Builder image
-FROM golang:1.11.5-alpine as builder
+FROM golang:1.12-alpine as builder
 
 RUN apk add --no-cache \
     wget \

circle.yml

@@ -3,7 +3,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: golang:1.11.3
+      - image: golang:1.12
     working_directory: /go/src/github.com/pingcap/tidb
     steps:
       - checkout

go.sum

@@ -15,7 +15,7 @@ github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd h1:qMd81Ts1T
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
 github.com/coreos/bbolt v1.3.0 h1:HIgH5xUWXT914HCI671AxuTTqjj64UOFr7pHn48LUTI=
 github.com/coreos/bbolt v1.3.0/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
-github.com/coreos/etcd v3.3.10+incompatible h1:KjVWqrZ5U0wa3CxY2AxlH6/UcB+PK2td1DcsYhA+HRs=
+github.com/coreos/etcd v3.3.10+incompatible h1:jFneRYjIvLMLhDLCzuTuU4rSJUjRplcJQ7pD7MnhC04=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-semver v0.2.0 h1:3Jm3tLmsgAYcjC+4Up7hJrFBPr+n7rAqYeSw/SZazuY=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
@@ -68,7 +68,7 @@ github.com/gorilla/mux v1.6.2 h1:Pgr17XVTNXAk3q/r4CpKzC5xBM/qW1uVLV+IhRZpIIk=
 github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
 github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
-github.com/grpc-ecosystem/go-grpc-middleware v1.0.0 h1:BWIsLfhgKhV5g/oF34aRjniBHLTZe5DNekSjbAjIS6c=
+github.com/grpc-ecosystem/go-grpc-middleware v1.0.0 h1:Iju5GlWwrvL6UBg4zJJt3btmonfrMlCDdsejg4CZE7c=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 h1:Ovs26xHkKqVztRpIrF/92BcuyuQ/YW4NSIpoGtfXNho=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=

tools/check/go.sum

@@ -1,30 +1,21 @@
 github.com/BurntSushi/toml v0.3.0 h1:e1/Ivsx3Z0FVTV0NSOv/aVgbUWyQuzj7DDnFblkRvsY=
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-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc h1:cAKDfWh5VpdgMhJosfJnn5/FoN2SRZ4p7fJNX58YPaU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf h1:qet1QNfXsQxTZqLG4oE62mJzwPIB8+Tee4RNCL9ulrY=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/chzchzchz/goword v0.0.0-20170907005317-a9744cb52b03 h1:0wUHjDfbCAROEAZ96zAJGwcNMkPIheFaIjtQyv3QqfM=
 github.com/chzchzchz/goword v0.0.0-20170907005317-a9744cb52b03/go.mod h1:uFE9hX+zXEwvyUThZ4gDb9vkAwc5DoHUnRSEpH0VrOs=
-github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
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-github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf h1:7+FW5aGwISbqUtkfmIpZJGRgNFg2ioYPvFaUxdqpDsg=
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 github.com/kisielk/errcheck v1.2.0 h1:reN85Pxc5larApoH1keMBiu2GWtPqXQ1nc9gx+jOU+E=
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/gotool v0.0.0-20161130080628-0de1eaf82fa3/go.mod h1:jxZFDH7ILpTPQTk+E2s+z4CUas9lVNjIuKR4c5/zKgM=
-github.com/kisielk/gotool v1.0.0 h1:AV2c/EiW3KqPNT9ZKl07ehoAGi4C5/01Cfbblndcapg=
-github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
@@ -39,21 +30,16 @@ github.com/mgechev/dots v0.0.0-20180605013149-8e09d8ea2757/go.mod h1:KQ7+USdGKfp
 github.com/mgechev/revive v0.0.0-20181210140514-b4cc152955fb h1:bLiKpCHe+ngBsF1o7DjZTmoffHEy2gdQ/+9NunuJ4ZY=
 github.com/mgechev/revive v0.0.0-20181210140514-b4cc152955fb/go.mod h1:pVHj2KvxEhotJ6Lmr7zb3YgNMX1QKt8cyp6fdPHOrzU=
 github.com/mozilla/tls-observatory v0.0.0-20180409132520-8791a200eb40/go.mod h1:SrKMQvPiws7F7iqYp8/TX+IhxCYhzr6N/1yb8cwHsGk=
-github.com/nbutton23/zxcvbn-go v0.0.0-20160627004424-a22cb81b2ecd h1:hEzcdYzgmGA1zDrSYdh+OE4H43RrglXdZQ5ip/+93GU=
 github.com/nbutton23/zxcvbn-go v0.0.0-20160627004424-a22cb81b2ecd/go.mod h1:o96djdrsSGy3AWPyBgZMAGfxZNfgntdJG+11KU4QvbU=
-github.com/nicksnyder/go-i18n v1.10.0 h1:5AzlPKvXBH4qBzmZ09Ua9Gipyruv6uApMcrNZdo96+Q=
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 github.com/olekukonko/tablewriter v0.0.0-20180912035003-be2c049b30cc h1:rQ1O4ZLYR2xXHXgBCCfIIGnuZ0lidMQw2S5n1oOv+Wg=
 github.com/olekukonko/tablewriter v0.0.0-20180912035003-be2c049b30cc/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo=
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-github.com/ryanuber/go-glob v0.0.0-20170128012129-256dc444b735 h1:7YvPJVmEeFHR1Tj9sZEYsmarJEQfMVYpd/Vyy/A8dqE=
 github.com/ryanuber/go-glob v0.0.0-20170128012129-256dc444b735/go.mod h1:807d1WSdnB0XRJzKNil9Om6lcp/3a0v4qIHxIXzX/Yc=
-github.com/securego/gosec v0.0.0-20181211171558-12400f9a1ca7 h1:Ca7U7/rZ+caxjW2na7wbmgmaPsoSCIlpc6sm0aWtFg0=
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@@ -62,29 +48,14 @@ golang.org/x/sys v0.0.0-20171026204733-164713f0dfce/go.mod h1:STP8DvDyc/dI5b8T5h
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