Compile does't search local vendor packages if the project is not put under GOPATH.

[zigo101]

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

go version go1.7.3 linux/amd64

What did you do?

I have a go project, which has a local vendor folder containing one local lib package.
The main package imports the lib package.
The main package doesn't import any other packages.

When the project is put under $GOPATH, it compiles ok,
But if the project is put outside of $GOPATH, then compiler reports the local lib package is not found.

What did you expect to see?

I hope the project also compiles ok if it is put outside of $GOPATH.

[bradfitz]

Sorry, it has to be under the GOPATH.

For questions about Go, see https://golang.org/wiki/Questions.

[bradfitz]

Also, this is a dup of #14566.

There is proposal #17271 to make GOPATH more optional.

But currently GOPATH is required to do any halfway complicated builds.