pkg/errors 0.8.1 is a bug fix release for errors 0.8.0. It will be the last version to support Go 1.8 and below. pkg/errors 0.9 and above will require Go 1.9 for the new runtime.CallersFrames API.

pkg/errors 0.8.1 also adds one new feature, errors.WithMessagef. Ideally this would be held over til 0.9, but that complicates the switch to runtime.CallersFrames.

Improvements

• Added errors.WithMessagef. Thanks @chemicL.

Bugs fixed

• .travis.yml. Adjust Go versions. Thanks @AlekSi, @dvrkps, @HaraldNordgren, and @komuw
• Fixed gofmt. Thanks @tariq1890
• Copyedit the package documentation. Thanks @seh, @TomSweeneyRedHat, @nicksnyder, and @beono
• Remove unreachable code. Thanks @philoserf and @haya14busa
• Move benchmark error sink to global variable. Thanks @bradleyfalzon
• Fix minor newline consistency issues in test files. Thanks @nmiyake
• Add doc comment for exported Format func. Thanks @mrhwick and @ihrwein