/usr/share/gocode/src/ is in golang-github-juju-errors-dev 0.0~git20170703.0.c7d06af-4.
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/usr/share/gocode/src/github.com/
/usr/share/gocode/src/github.com/juju/
/usr/share/gocode/src/github.com/juju/errors/
/usr/share/gocode/src/github.com/juju/errors/doc.go
/usr/share/gocode/src/github.com/juju/errors/error.go
/usr/share/gocode/src/github.com/juju/errors/error_test.go
/usr/share/gocode/src/github.com/juju/errors/errortypes.go
/usr/share/gocode/src/github.com/juju/errors/errortypes_test.go
/usr/share/gocode/src/github.com/juju/errors/example_test.go
/usr/share/gocode/src/github.com/juju/errors/export_test.go
/usr/share/gocode/src/github.com/juju/errors/functions.go
/usr/share/gocode/src/github.com/juju/errors/functions_test.go
/usr/share/gocode/src/github.com/juju/errors/package_test.go
/usr/share/gocode/src/github.com/juju/errors/path.go
/usr/share/gocode/src/github.com/juju/errors/path_test.go