go install: no install location for directory * outside GOPATH

[Dan Kortschak]

Can someone help me out with this error? I'm obviously missing something
really obvious; but errors is clearly in my GOPATH.

Ahh, I cannot name the package "errors". Why?

$ go install
go install: no install location for directory /home/daniel/Development/src/errors outside GOPATH
$ go env
GOARCH="amd64"
GOBIN=""
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/daniel/Development"
GORACE=""
GOROOT="/usr/local/src/go"
GOTOOLDIR="/usr/local/src/go/pkg/tool/linux_amd64"
CC="gcc"
GOGCCFLAGS="-g -O2 -fPIC -m64 -pthread"
CGO_ENABLED="1"

[Dave Cheney]

errors is already owned by the standard library.

Try again with something like fmt or image/gif. If this is the same
error, then please raise a bug, the go tool should detect this
earlier* and give a better error

Dave

* i believe the Go tool is compiling the pkg to a temp directory then
getting confused because the normal path that errors would be
installed to, $GOROOT/pkg/$GOOS_$GOARCH/ is rightly not inside
$GOPATH.

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[Dan Kortschak]

Yes, I figured that when I changed the package name. It seems to be an
unfortunate collision of me using errors as the package and working at
the base of my GOPATH out of laziness. I was surprised as I have an
errors package that is deeper in my GOPATH which works fine, but you
explanation makes perfect sense.

Yes, fmt does the same thing:

$ go install
go install: no install location for directory /home/daniel/Development/src/fmt outside GOPATH

http://code.google.com/p/go/issues/detail?id=5774

thanks
Dan

[Dave Cheney]

Thanks for raising the issue. The root cause is, some names are
reserved for the standard library. How we handle that could be a
subject of debate. Eg, do we compile $GOPATH/src/errors into
$GOPATH/pkg/$GOOS_$GOARCH/errors.a? If so, you'll never be able to
reference it.