tree 3c771dcbae21d73046c57b5c71631186422710e6
parent 785921b1c1ecc027064eaf6616a7a01b4c292597
author Dave Cheney <dave@cheney.net> 1469702214 +1000
committer Dave Cheney <dave@cheney.net> 1470630682 +1000

Destructure Wrap{,f} into WithStack(WithMessage(err, msg))

Introduces WithMessage as well as errors.fundamental, errors.withMessage
and errors.withStack internal types.

Adjust tests for the new wrapped format when combining fundamental and
wrapped errors.