Cabal internal error on travis

[Ericson2314]

See https://travis-ci.org/reflex-frp/reflex/builds/624367109?utm_source=github_status&utm_medium=notification:

CallStack (from HasCallStack):
  error, called at ./Distribution/Client/InstallPlan.hs:262:25 in main:Distribution.Client.InstallPlan

What is this about?

CC @phadej, who might know.

[Ericson2314]

https://travis-ci.org/reflex-frp/reflex/builds/624728410?utm_source=github_status&utm_medium=notification More occurences, not GHCJS.

[phadej]

As I commented on the PR, try to clean the Travis caches. In the next cabal-install version (i.e. 3.0.1.0), we should have

internal error in InstallPlan.completed: not in configured state: Installed markdown-unlit-0.5.0-7ff893d1a2e27521e9cd2e41417095faa586108256bcd47f736fd82f6ac6ab4a
CallStack (from HasCallStack):
  error, called at ./Distribution/Client/InstallPlan.hs:270:25 in main:Distribution.Client.InstallPlan
  internalError, called at ./Distribution/Client/InstallPlan.hs:659:26 in main:Distribution.Client.InstallPlan

like errors, which would help to understand what's wrong.
I have a PoC for repairing the store, which wouldn't require wiping it completely, but it needs a solution to haskell/cabal#6437, so will take some time to fix properly.

EDIT: The cabal issue is haskell/cabal#6396

[Ericson2314]

Thanks for the quick feedback, @phadej! So I run haskell-ci again or something to use the unreleased version of cabal-install to get the better error messages?

[phadej]

@Ericson2314 you don't need to do anything, cabal-install-3.0 is updated already to cabal-install-3.0.1.0-rc3 tag (you can see that 3.0.1.0 version is used in cabal --version output).

E.g. already in https://travis-ci.org/reflex-frp/reflex/jobs/626274133 (though that might had some previous RC).

[Ericson2314]

OK, Great! Thanks again.