CI is failing because of golint failures:

/home/travis/gopath/src/github.com/opencontainers/umoci/oci/casext/fuzzer.go:28:1: exported function Fuzz should have comment or be unexported
/home/travis/gopath/src/github.com/opencontainers/umoci/pkg/hardening/fuzzer.go:22:2: a blank import should be only in a main or test package, or have a comment justifying it
/home/travis/gopath/src/github.com/opencontainers/umoci/pkg/hardening/fuzzer.go:27:1: exported function Fuzz should have comment or be unexported

Codecov Report

Merging #362 (259b8f1) into master (64c4898) will decrease coverage by 5.79%.
The diff coverage is 19.23%.

@@            Coverage Diff             @@
##           master     #362      +/-   ##
==========================================
- Coverage   74.26%   68.47%   -5.80%     
==========================================
  Files          58       58              
  Lines        3078     3112      +34     
==========================================
- Hits         2286     2131     -155     
- Misses        463      642     +179     
- Partials      329      339      +10     

@cyphar Why does CI complain about the build comment in this PR?

Go needs the // +build tag to be at the top of the file, it can't be after the copyright comments. (Right now the // +build comment is just a comment -- which is why the CodeCov coverage has dropped -- there's a bunch of dead code not being executed by the test suite.)

(The error is coming from go vet.)

I've carried this in #365.