What did you do?

vim-go uses guru for :Godef. This doesn’t seem to work for looking up definitions in dependencies that have been downloaded as modules. For instance I can go to a definition and it will take me into the specific file in that dependency (e.g. ~/go/pkg/mod/golang.org/x/oauth2@v0.0.0-20181203162652-d668ce993890/oauth2.go). :GoDef within that file works, but jumping to a definition in the same package in a different file does not work (e.g. :GoDef on Token says vim-go: guru: no object for identifier)

Here's an example repo as a jumping off point:
https://github.com/voutasaurus/oauthtest/tree/2aac50ff8003ec8f56ac1f71f78efc00cd130a97

The file:
https://github.com/voutasaurus/oauthtest/blob/2aac50ff8003ec8f56ac1f71f78efc00cd130a97/cmd/web/main.go

Use existing go.mod in the repo.

:GoDef on oauth2.Config, then from oauth2.go use :GoDef on TokenSource (this works), then use :GoDef on Token. This gives the error: vim-go: guru: no object for identifier.

What did you expect to see?

I expected to be taken to the definition of Token in ~/go/pkg/mod/golang.org/x/oauth2@v0.0.0-20181203162652-d668ce993890/token.go

What did you see instead?

The error: vim-go: guru: no object for identifier.

Does this issue reproduce with the latest release (go1.11.4)?

Yes I also tested with go1.11.4 and the same error occurs.

System details

go version go1.12beta1 darwin/amd64
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/vout/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/vout/go"
GOPROXY=""
GORACE=""
GOROOT="/Users/vout/sdk/go1.12beta1"
GOTMPDIR=""
GOTOOLDIR="/Users/vout/sdk/go1.12beta1/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOROOT/bin/go version: go version go1.12beta1 darwin/amd64
GOROOT/bin/go tool compile -V: compile version go1.12beta1
uname -v: Darwin Kernel Version 18.2.0: Mon Nov 12 20:24:31 PST 2018; root:xnu-4903.231.4~1/RELEASE_X86_64
ProductName:	Mac OS X
ProductVersion:	10.14.2
BuildVersion:	18C52a
lldb --version: lldb-1000.0.38.2
  Swift-4.2