cmd/go: go mod tidy revoke the modify about go.sum made by go build

[Sherlock-Holo]

What version of Go are you using (go version)?

go version go1.11.2 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

GOARCH="amd64"
GOBIN=""
GOCACHE="/home/sherlock/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/sherlock/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/lib/go"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/sherlock/git/recruitment/interview/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build973697242=/tmp/go-build -gno-record-gcc-switches"

What did you do?

go mod tidy and then git add . and then go build -v , go mod tidy again

What did you expect to see?

go.sum isn't modified

What did you see instead?

use git diff and found go.sum has been modified. go mod tidy again and it revoke the modify which go build -v do

[bcmills]

If it involves a replaced module, this is a duplicate of #27868.

Otherwise, it needs more detail: please provide an exact sequence of commands we can execute to reproduce the problem, including the directory structure and the contents of the .go and go.mod files.

[bcmills]

Provisionally closing as a duplicate of #27868. Please let us know if you can reproduce this without replacement modules.