/usr/share/gocode/src/ is in golang-github-prometheus-common-dev 0+git20160104.0a3005b-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/github.com/
/usr/share/gocode/src/github.com/prometheus/
/usr/share/gocode/src/github.com/prometheus/common/
/usr/share/gocode/src/github.com/prometheus/common/client_model/
/usr/share/gocode/src/github.com/prometheus/common/client_model/metrics.pb.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/
/usr/share/gocode/src/github.com/prometheus/common/expfmt/bench_test.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/decode.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/decode_test.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/encode.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/expfmt.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/fuzz.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/json_decode.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/json_decode_test.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/testdata/
/usr/share/gocode/src/github.com/prometheus/common/expfmt/testdata/json2
/usr/share/gocode/src/github.com/prometheus/common/expfmt/testdata/json2_bad
/usr/share/gocode/src/github.com/prometheus/common/expfmt/testdata/protobuf
/usr/share/gocode/src/github.com/prometheus/common/expfmt/testdata/protobuf.gz
/usr/share/gocode/src/github.com/prometheus/common/expfmt/testdata/test.gz
/usr/share/gocode/src/github.com/prometheus/common/expfmt/testdata/text
/usr/share/gocode/src/github.com/prometheus/common/expfmt/text_create.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/text_create_test.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/text_parse.go
/usr/share/gocode/src/github.com/prometheus/common/expfmt/text_parse_test.go
/usr/share/gocode/src/github.com/prometheus/common/internal/
/usr/share/gocode/src/github.com/prometheus/common/internal/bitbucket.org/
/usr/share/gocode/src/github.com/prometheus/common/internal/bitbucket.org/ww/
/usr/share/gocode/src/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/
/usr/share/gocode/src/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go
/usr/share/gocode/src/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg_test.go
/usr/share/gocode/src/github.com/prometheus/common/log/
/usr/share/gocode/src/github.com/prometheus/common/log/log.go
/usr/share/gocode/src/github.com/prometheus/common/log/log_test.go
/usr/share/gocode/src/github.com/prometheus/common/log/syslog_formatter.go
/usr/share/gocode/src/github.com/prometheus/common/model/
/usr/share/gocode/src/github.com/prometheus/common/model/alert.go
/usr/share/gocode/src/github.com/prometheus/common/model/alert_test.go
/usr/share/gocode/src/github.com/prometheus/common/model/fingerprinting.go
/usr/share/gocode/src/github.com/prometheus/common/model/fnv.go
/usr/share/gocode/src/github.com/prometheus/common/model/labels.go
/usr/share/gocode/src/github.com/prometheus/common/model/labels_test.go
/usr/share/gocode/src/github.com/prometheus/common/model/labelset.go
/usr/share/gocode/src/github.com/prometheus/common/model/metric.go
/usr/share/gocode/src/github.com/prometheus/common/model/metric_test.go
/usr/share/gocode/src/github.com/prometheus/common/model/model.go
/usr/share/gocode/src/github.com/prometheus/common/model/signature.go
/usr/share/gocode/src/github.com/prometheus/common/model/signature_test.go
/usr/share/gocode/src/github.com/prometheus/common/model/silence.go
/usr/share/gocode/src/github.com/prometheus/common/model/silence_test.go
/usr/share/gocode/src/github.com/prometheus/common/model/time.go
/usr/share/gocode/src/github.com/prometheus/common/model/time_test.go
/usr/share/gocode/src/github.com/prometheus/common/model/value.go
/usr/share/gocode/src/github.com/prometheus/common/model/value_test.go
/usr/share/gocode/src/github.com/prometheus/common/route/
/usr/share/gocode/src/github.com/prometheus/common/route/route.go
/usr/share/gocode/src/github.com/prometheus/common/route/route_test.go