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haskell / play-haskell

Haskell Playground
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Add `ghc-internal` to the list of visible packages #45

Closed s-and-witch closed 3 months ago

s-and-witch commented 3 months ago

Feature request

If you try to import any module from ghc-internal (e.g. GHC.Internal.TypeError), that was introduced in ghc 9.10, you get this error:

Main.hs:2:1: error: [GHC-87110]
    Could not load module ‘GHC.Internal.TypeError’.
    It is a member of the hidden package ‘ghc-internal-9.1001.0’.
    Use -v to see a list of the files searched for.

That limits access to the newly introduced Haskell features, so the user can't test to see some corner cases of the behavior or present a showcase to others about how useful the feature is.

tomsmeding commented 3 months ago

Thanks, apparently I haven't been following stuff closely enough! Looking at the GHC 9.10 changelog (which doesn't mention ghc-internal!), I guess that also goes for ghc-experimental and ghc-heap?

s-and-witch commented 3 months ago

That's true for ghc-experimental, i.e. I can't import Data.Tuple.Experimental, but I can import modules from ghc-heap

tomsmeding commented 3 months ago

Fixed in https://github.com/haskell/play-haskell/commit/7eeb82a017a5f78c1d380fde1c08bf8dbf508d27