/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/ is in golang-goprotobuf-dev 0.0~git20170808.0.1909bc2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/Makefile
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/extension_base.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/extension_extra.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/extension_test.go
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/extension_user.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/grpc.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/imp.pb.go.golden
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/imp.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/imp2.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/imp3.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/main_test.go
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/multi/
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/multi/multi1.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/multi/multi2.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/multi/multi3.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/my_test/
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/my_test/test.pb.go
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/my_test/test.pb.go.golden
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/my_test/test.proto
/usr/share/gocode/src/github.com/golang/protobuf/protoc-gen-go/testdata/proto3.proto