cmd/cover: failing TestFuncWithDuplicateLines

[sudeeshjohn]

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

$ go version
go version go1.11.1 linux/amd64

built version:

root@ubuntu18:/go/src/golang/go# ./bin/go version
go version devel +cb8054a6b6 Fri Mar 15 04:15:59 2019 +0000 linux/amd64
root@ubuntu18:/go/src/golang/go#

Does this issue reproduce with the latest release?

No. The issue is there with the upstream master.

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

go env Output

$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
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-build733849470=/tmp/go-build -gno-record-gcc-switches"

What did you do?

git clone https://github.com/golang/go.git && cd go/src && ./all.bash

What did you expect to see?

all the tests should have passed

What did you see instead?

ok  	cmd/compile/internal/test	0.023s [no tests to run]
ok  	cmd/compile/internal/types	0.035s
--- FAIL: TestFuncWithDuplicateLines (3.26s)
    cover_test.go:553: running [/go/src/golang/go/bin/go test -toolexec=/tmp/gotestcover178375904/toolexec.exe /tmp/gotestcover178375904/cover.exe -cover -covermode count -coverprofile /tmp/gotestcover178375904/linedup/linedup.out]
    cover_test.go:553: go: cannot find main module; see 'go help modules'
    cover_test.go:553: exit status 1
FAIL
FAIL	cmd/cover	6.872s
ok  	cmd/doc	0.047s
ok  	cmd/fix	13.342s

[bcmills]

Fixed by https://golang.org/cl/167740.