/usr/share/gocode/src/code.google.com/p/go.net/ipv4/ is in golang-go.net-dev 0.0~hg20131201-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/gocode/src/code.google.com/p/go.net/ipv4/control.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/control_bsd.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/control_linux.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/control_plan9.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/control_windows.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/dgramopt_plan9.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/dgramopt_posix.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/doc.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/endpoint.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/example_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/gen.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/genericopt_plan9.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/genericopt_posix.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/gentest.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/header.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/header_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/helper.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/helper_plan9.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/helper_posix.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/helper_unix.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/helper_windows.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/iana.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/iana_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/icmp.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/mockicmp_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/mocktransponder_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/multicast_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/multicastlistener_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/multicastsockopt_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/packet.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/payload.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/sockopt_bsd.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/sockopt_freebsd.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/sockopt_linux.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/sockopt_plan9.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/sockopt_unix.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/sockopt_windows.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/unicast_test.go
/usr/share/gocode/src/code.google.com/p/go.net/ipv4/unicastsockopt_test.go