/usr/share/gocode/src/ is in golang-golang-x-oauth2-dev 0.0~git20151116.0.442624c-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/golang.org/
/usr/share/gocode/src/golang.org/x/
/usr/share/gocode/src/golang.org/x/oauth2/
/usr/share/gocode/src/golang.org/x/oauth2/bitbucket/
/usr/share/gocode/src/golang.org/x/oauth2/bitbucket/bitbucket.go
/usr/share/gocode/src/golang.org/x/oauth2/client_appengine.go
/usr/share/gocode/src/golang.org/x/oauth2/clientcredentials/
/usr/share/gocode/src/golang.org/x/oauth2/clientcredentials/clientcredentials.go
/usr/share/gocode/src/golang.org/x/oauth2/clientcredentials/clientcredentials_test.go
/usr/share/gocode/src/golang.org/x/oauth2/example_test.go
/usr/share/gocode/src/golang.org/x/oauth2/facebook/
/usr/share/gocode/src/golang.org/x/oauth2/facebook/facebook.go
/usr/share/gocode/src/golang.org/x/oauth2/github/
/usr/share/gocode/src/golang.org/x/oauth2/github/github.go
/usr/share/gocode/src/golang.org/x/oauth2/google/
/usr/share/gocode/src/golang.org/x/oauth2/google/appengine.go
/usr/share/gocode/src/golang.org/x/oauth2/google/appengine_hook.go
/usr/share/gocode/src/golang.org/x/oauth2/google/appenginevm_hook.go
/usr/share/gocode/src/golang.org/x/oauth2/google/default.go
/usr/share/gocode/src/golang.org/x/oauth2/google/example_test.go
/usr/share/gocode/src/golang.org/x/oauth2/google/google.go
/usr/share/gocode/src/golang.org/x/oauth2/google/google_test.go
/usr/share/gocode/src/golang.org/x/oauth2/google/jwt.go
/usr/share/gocode/src/golang.org/x/oauth2/google/sdk.go
/usr/share/gocode/src/golang.org/x/oauth2/google/sdk_test.go
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/gcloud/
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/gcloud/credentials
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/gcloud/properties
/usr/share/gocode/src/golang.org/x/oauth2/internal/
/usr/share/gocode/src/golang.org/x/oauth2/internal/oauth2.go
/usr/share/gocode/src/golang.org/x/oauth2/internal/oauth2_test.go
/usr/share/gocode/src/golang.org/x/oauth2/internal/token.go
/usr/share/gocode/src/golang.org/x/oauth2/internal/token_test.go
/usr/share/gocode/src/golang.org/x/oauth2/internal/transport.go
/usr/share/gocode/src/golang.org/x/oauth2/jws/
/usr/share/gocode/src/golang.org/x/oauth2/jws/jws.go
/usr/share/gocode/src/golang.org/x/oauth2/jwt/
/usr/share/gocode/src/golang.org/x/oauth2/jwt/example_test.go
/usr/share/gocode/src/golang.org/x/oauth2/jwt/jwt.go
/usr/share/gocode/src/golang.org/x/oauth2/jwt/jwt_test.go
/usr/share/gocode/src/golang.org/x/oauth2/linkedin/
/usr/share/gocode/src/golang.org/x/oauth2/linkedin/linkedin.go
/usr/share/gocode/src/golang.org/x/oauth2/oauth2.go
/usr/share/gocode/src/golang.org/x/oauth2/oauth2_test.go
/usr/share/gocode/src/golang.org/x/oauth2/odnoklassniki/
/usr/share/gocode/src/golang.org/x/oauth2/odnoklassniki/odnoklassniki.go
/usr/share/gocode/src/golang.org/x/oauth2/paypal/
/usr/share/gocode/src/golang.org/x/oauth2/paypal/paypal.go
/usr/share/gocode/src/golang.org/x/oauth2/token.go
/usr/share/gocode/src/golang.org/x/oauth2/token_test.go
/usr/share/gocode/src/golang.org/x/oauth2/transport.go
/usr/share/gocode/src/golang.org/x/oauth2/transport_test.go
/usr/share/gocode/src/golang.org/x/oauth2/vk/
/usr/share/gocode/src/golang.org/x/oauth2/vk/vk.go