/usr/share/gocode/src/github.com/klauspost/cpuid/generate.go is in golang-github-klauspost-cpuid-dev 0.0~git20151214.0.ef30b90-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | package cpuid
//go:generate go run private-gen.go
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