CI fails with a confusing error message

[mitchellwrosen]

Hi all,

I've recently regenerated a .github/workflows/ci.yaml with haskell-ci and I'm puzzled by the error message.

You can see the run here:

https://github.com/awkward-squad/text-ansi/actions/runs/6305291765/job/17118430899

Here's the failure log of the dump install plan step:

Resolving dependencies...
Error: cabal-3.10.1.0: Could not resolve dependencies:
[__0] trying: text-ansi-0.3.0 (user goal)
[__1] trying: text-builder-linear-0.1.1.1 (dependency of text-ansi)
[__2] next goal: text (dependency of text-ansi)
[__2] rejecting: text-1.2.5.0/installed-1.2.5.0 (conflict: text-builder-linear => text>=2.0 && <2.2)
[__2] rejecting: text-2.1, text-2.0.2, text-2.0.1, text-2.0, text-1.2.5.0, text-1.2.4.1, text-1.2.4.0, text-1.2.3.2, text-1.2.3.1, text-1.2.3.0, text-1.2.2.2, text-1.2.2.1, text-1.2.2.0, text-1.2.1.3, text-1.2.1.2, text-1.2.1.1, text-1.2.1.0, text-1.2.0.6, text-1.2.0.5, text-1.2.0.4, text-1.2.0.3, text-1.2.0.2, text-1.2.0.0, text-1.1.1.4, text-1.1.1.3, text-1.1.1.2, text-1.1.1.1, text-1.1.1.0, text-1.1.0.1, text-1.1.0.0, text-1.0.0.1, text-1.0.0.0, text-0.11.3.1, text-0.11.3.0, text-0.11.2.3, text-0.11.2.2, text-0.11.2.1, text-0.11.2.0, text-0.11.1.13, text-0.11.1.12, text-0.11.1.11, text-0.11.1.10, text-0.11.1.9, text-0.11.1.8, text-0.11.1.7, text-0.11.1.6, text-0.11.1.5, text-0.11.1.3, text-0.11.1.2, text-0.11.1.1, text-0.11.1.0, text-0.11.0.8, text-0.11.0.7, text-0.11.0.6, text-0.11.0.5, text-0.11.0.4, text-0.11.0.3, text-0.11.0.2, text-0.11.0.1, text-0.11.0.0, text-0.10.0.2, text-0.10.0.1, text-0.10.0.0, text-0.9.1.0, text-0.9.0.1, text-0.9.0.0, text-0.8.1.0, text-0.8.0.0, text-0.7.2.1, text-0.7.1.0, text-0.7.0.1, text-0.7, text-0.6, text-0.5, text-0.4, text-0.3, text-0.2, text-0.1 (constraint from project config /__w/text-ansi/text-ansi/cabal.project.local requires installed instance)
[__2] fail (backjumping, conflict set: text, text-ansi, text-builder-linear)
After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: text, text-ansi, text-builder-linear

It's a bit difficult for me to debug what's going on here, as I'm not sure what

constraint from project config /__w/text-ansi/text-ansi/cabal.project.local requires installed instance

means.

For what it's worth, I tried building this package at the command like with cabal build -w ghc-9.2.8, and it also failed, though due to a GHC panic. So, it seems to have gotten farther than CI did ;)

Any help understanding this issue would be appreciated. Thanks.

[phadej]

See if #677 answers your question