x/tools/cmd/gotype: (can't find import: ) [GO15VENDOREXPERIMENT=1]

[runningmaster]

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

$ go version
go version go1.6rc1 linux/amd64

2 What operating system and processor architecture are you using?

$ cat /etc/redhat-release 
Fedora release 23 (Twenty Three)

$ lscpu
Architecture:          x86_64
...

3 What did you do?

Project for test:
$GOPATH/src/main/main.go
$GOPATH/src/vendor/github.com/bradfitz/iter/iter.go

$ cat main.go 
package main

import (
    "fmt"
    "github.com/bradfitz/iter"
)

func main() {
    for i := range iter.N(10) {
        fmt.Println(i)
    }
}

4 What did you expect to see?

Nothing (that's OK)

$ gotype main

5 What did you see instead?

$ go env && go version && gotype main
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/dmitriy/Development/go-proj"
GORACE=""
GOROOT="/home/dmitriy/Development/go1.6rc1"
GOTOOLDIR="/home/dmitriy/Development/go1.6rc1/pkg/tool/linux_amd64"
GO15VENDOREXPERIMENT="1"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="g++"
CGO_ENABLED="1"
go version go1.6rc1 linux/amd64
main/main.go:5:2: could not import github.com/bradfitz/iter (can't find import: )
main/main.go:9:17: undeclared name: iter
main/main.go:9:17: cannot range over iter.N(10) (invalid operand)

Note: other tools from Go Meta Linter work OK.

[ianlancetaylor]

CC @griesemer @alandonovan

[griesemer]

@runningmaster Is this an issue with x/tools/cmd/gotype only? Or also with std lib gotype? (in go/types).

[runningmaster]

@griesemer

It's also with std lib gotype. I did $ go build gotype.go in go/types and replaced it gotype from x/tools/cmd/gotype. All errors are here.

$ tree -d /home/dmitriy/Development/go-proj/
/home/dmitriy/Development/go-proj/
├── bin
├── pkg
│   └── linux_amd64
│       ├── internal
│       └── vendor
│           └── github.com
│               └── bradfitz
└── src
    ├── internal
    │   └── version
    ├── main
    └── vendor
        └── github.com
            └── bradfitz
                └── iter

$ pwd && echo && cat main.go
/home/dmitriy/Development/go-proj/src/main

package main

import (
    "fmt"

    "github.com/bradfitz/iter"

    "internal/version"
)

func main() {
    for i := range iter.N(10) {
        fmt.Println(version.AppName(), i)
    }
}

$ pwd && echo && go env && echo && go version && echo && gotype main
/home/dmitriy/Development/go-proj/src

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/dmitriy/Development/go-proj"
GORACE=""
GOROOT="/home/dmitriy/Development/go"
GOTOOLDIR="/home/dmitriy/Development/go/pkg/tool/linux_amd64"
GO15VENDOREXPERIMENT="1"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="g++"
CGO_ENABLED="1"

go version devel +6a208ef Tue Feb 9 00:17:25 2016 +0000 linux/amd64

main/main.go:6:2: could not import github.com/bradfitz/iter (can't find import: )
main/main.go:12:17: undeclared name: iter
main/main.go:12:17: cannot range over iter.N(10) (invalid operand)

[griesemer]

@runningmaster Temporary work-around: I believe this should work if you provide the full (absolute) path name for main (/home/dmitriy/Development/go-proj/src/main in this case).

But it's clearly a bug. Fix forthcoming.

[gopherbot]

CL https://golang.org/cl/19393 mentions this issue.

[gopherbot]

CL https://golang.org/cl/19394 mentions this issue.

[runningmaster]

@griesemer

Temporary work-around: I believe this should work if you provide the full (absolute) path name for main (/home/dmitriy/Development/go-proj/src/main in this case).

Workaround works fine for go/gotype and x/tools/cmd/gotype too.

$ go env && go version && gotype $(pwd)/main

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/dmitriy/Development/go-proj"
GORACE=""
GOROOT="/home/dmitriy/Development/go"
GOTOOLDIR="/home/dmitriy/Development/go/pkg/tool/linux_amd64"
GO15VENDOREXPERIMENT="1"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="g++"
CGO_ENABLED="1"
go version devel +79d9f48 Tue Feb 9 21:12:32 2016 +0000 linux/amd64

Actually I use command go list ./... | grep -v vendor/ | xargs -L1 gometalinter in my bash file for checking my code, but gotype in this case writes errors. Now all works fine (using workaround). Thank you.

[griesemer]

@runningmaster This has been fixed (at tip) and should not require the work-around anymore.