It's using Text.Show.Pretty to do the pretty-printing. That works by showing the value, and then trying to parse the string, and that parsing must be failing for Repo.
Ah, I suspect this is because some of the data types used inside Repo lack a Read instance. While I derived some of my own, in Github.Data.Readable, Text.Show.Pretty will not see those orphan instances, and so can't use them for reading things like GithubDate that are part of the Repo. So, this needs to be fixed in the Github library. I actually already filed a bug upstream requesting this; it was implemented; made things slow somehow, and closed. https://github.com/fpco/github/issues/4 There is also a bug report open upstream requesting it support serializing the data back to JSON. Which would fix this nicely as a side effect. https://github.com/fpco/github/issues/9 -- see shy jo
signature.asc
Description: Digital signature
