/usr/share/ is in golang-gopkg-gomail.v2-dev 2.0.0+git20160411.23.81ebce5-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/golang-gopkg-gomail.v2-dev/
/usr/share/doc/
/usr/share/doc/golang-gopkg-gomail.v2-dev/README.md
/usr/share/doc/golang-gopkg-gomail.v2-dev/changelog.Debian.gz
/usr/share/doc/golang-gopkg-gomail.v2-dev/copyright
/usr/share/doc/golang-gopkg-gomail.v2-dev/doc.go
/usr/share/gocode/
/usr/share/gocode/src/
/usr/share/gocode/src/gopkg.in/
/usr/share/gocode/src/gopkg.in/gomail.v2/
/usr/share/gocode/src/gopkg.in/gomail.v2/auth.go
/usr/share/gocode/src/gopkg.in/gomail.v2/auth_test.go
/usr/share/gocode/src/gopkg.in/gomail.v2/doc.go
/usr/share/gocode/src/gopkg.in/gomail.v2/example_test.go
/usr/share/gocode/src/gopkg.in/gomail.v2/message.go
/usr/share/gocode/src/gopkg.in/gomail.v2/message_test.go
/usr/share/gocode/src/gopkg.in/gomail.v2/mime.go
/usr/share/gocode/src/gopkg.in/gomail.v2/mime_go14.go
/usr/share/gocode/src/gopkg.in/gomail.v2/send.go
/usr/share/gocode/src/gopkg.in/gomail.v2/send_test.go
/usr/share/gocode/src/gopkg.in/gomail.v2/smtp.go
/usr/share/gocode/src/gopkg.in/gomail.v2/smtp_test.go
/usr/share/gocode/src/gopkg.in/gomail.v2/writeto.go