/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/ is in golang-golang-x-crypto-dev 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/compressed.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/compressed_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/config.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/encrypted_key.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/encrypted_key_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/literal.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/ocfb.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/ocfb_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/one_pass_signature.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/opaque.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/opaque_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/packet.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/packet_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/private_key.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/private_key_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/public_key.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/public_key_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/public_key_v3.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/public_key_v3_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/reader.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/signature.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/signature_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/signature_v3.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/signature_v3_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/userattribute.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/userattribute_test.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/userid.go
/usr/share/gocode/src/golang.org/x/crypto/openpgp/packet/userid_test.go