Inaccurate version bounds

[hvr]

As can be seen at

• https://matrix.hackage.haskell.org/package/language-docker@1550016454

there were a few issues due to inaccurate and/or missing version bounds which affect reverse dependencies of language-docker. I've already manually fixed up those up for you via Hackage metadata revision, see e.g.

• https://hackage.haskell.org/package/language-docker-8.0.0/revisions/

and you can review the resulting report at

• https://matrix.hackage.haskell.org/package/language-docker@1550184710

Going forward, we need your help! Please help us ensure a good user experience for users of Hackage/Cabal by the use of the PVP mandated lower&upper bounds in order to reduce the penalty on the Hackage infrastructure as well as to avoid unnecessary extra work for you as well as for us Hackage Trustees!

[lorenzo]

What is the best way to keep the lower bound up to date?

[hvr]

I'm afraid, I don't have a really good answer to testing lower bounds for arbitrary packages. However, for the specific problem of testing lower bounds of non-upgradable packages such as base, the best way is currently to simply include all GHCs in your CI test-matrix.

That's why I created https://github.com/haskell-CI/haskell-ci and the associated Ubuntu PPA for convenient testing with all GHCs back through GHC 7.0 in test-matrices.

If you have any more questions about it, I'm happy to answer them if I can.