What version of Go are you using (go version)? 1.13

$ go version

Does this issue reproduce with the latest release? NO

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

GOARCH="amd64"
GOBIN="=/home/thornton/GO_WorkSpace/bin"
GOCACHE="/home/thornton/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/thornton/GO_WorkSpace"
GOPROXY=""
GORACE=""
GOROOT="/home/thornton/go"
GOTMPDIR=""
GOTOOLDIR="/home/thornton/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/thornton/GO_WorkSpace/src/hello/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-build927771379=/tmp/go-build -gno-record-gcc-switches"

$ go env

What did you do?

FIRST THE BASIC PROBLEM

Bottom Line: Simply installed 1.13 without doing anything special
, It appears to think it is 1.12.9 that is why GO111MODULE must be
set to "on" to get go mod init to work.
I have no idea what is going wrong - It appears to be a bad download file.

So downloaded it again - same problems!

THE FOLLOWING SUPPORTING INFORMATION:

Just installed 1.13

I first tested the hello.dir WITHOUT go.mod using LITEIDE and it worked
Ran go test in the same directory and got the version mismatch documented below

Running go test in the same dir produces the tool version mismatch shown below

With go.mod and GO111MODULE=auto
gp mod init failed
"go: modules disabled inside GOPATH/src by GO111MODULE=auto; see 'go help modules'"

What did you expect to see? A new go.mod file

What did you see instead?

Error Above

go version = go version go1.12.9 linux/amd64

The version file in go dir = 1.13

I tried setting GO111MODULE=on

go mod init

Produced: :"go: creating new go.mod: module hello"

NOW: ran go test on dir with hello test files

Produced::

NEPTUNE:hello$go tes

runtime/internal/sys

compile: version "go1.13" does not match go tool version "go1.12.9"

internal/race

compile: version "go1.13" does not match go tool version "go1.12.9"

unicode

compile: version "go1.13" does not match go tool version "go1.12.9"

unicode/utf8

compile: version "go1.13" does not match go tool version "go1.12.9"

internal/cpu

compile: version "go1.13" does not match go tool version "go1.12.9"

math/bits

compile: version "go1.13" does not match go tool version "go1.12.9"

sync/atomic

compile: version "go1.13" does not match go tool version "go1.12.9"

runtime/internal/atomic

compile: version "go1.13" does not match go tool version "go1.12.9"
FAIL hello [build failed]