/usr/share/go-1.10/src/crypto/sha512/ is in golang-1.10-src 1.10.1-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/go-1.10/src/crypto/sha512/fallback_test.go
/usr/share/go-1.10/src/crypto/sha512/sha512.go
/usr/share/go-1.10/src/crypto/sha512/sha512_test.go
/usr/share/go-1.10/src/crypto/sha512/sha512block.go
/usr/share/go-1.10/src/crypto/sha512/sha512block_amd64.go
/usr/share/go-1.10/src/crypto/sha512/sha512block_amd64.s
/usr/share/go-1.10/src/crypto/sha512/sha512block_decl.go
/usr/share/go-1.10/src/crypto/sha512/sha512block_generic.go
/usr/share/go-1.10/src/crypto/sha512/sha512block_ppc64le.s
/usr/share/go-1.10/src/crypto/sha512/sha512block_s390x.go
/usr/share/go-1.10/src/crypto/sha512/sha512block_s390x.s