Build fails

[hassansin]

Hi,

Recent change in errors package causes this package to fail: pkg/errors#183

[pkopac]

The error is:

../../heroku/rollrus/rollrus.go:284:28: cannot convert frame (type "github.com/pkg/errors".Frame) to type uintptr

[fgblomqvist]

FYI the change in errors was reverted: pkg/errors#188
This issue can, therefore, be closed.