bug#37366: closed (ghci can't find System.IO)

[GNU bug Tracking System]

Your message dated Wed, 10 Jun 2020 23:25:27 -0500
with message-id <874kriteiw.fsf@disroot.org>
and subject line ghci can't find System.IO
has caused the debbugs.gnu.org bug report #37366,
regarding ghci can't find System.IO
to be marked as done.

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-- 
37366: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37366
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> --- Begin Message ---
>
>
>
> Subject: 
>
> ghci can't find System.IO
>
>
>
>
> Date: 
>
> Tue, 10 Sep 2019 09:49:47 +0000
>
>
>
>
> with the latest ghc (qhws2nyqmjansrnqf78mz87l74v01mfx-ghc-8.6.5) i cannot start 
> ghci, due to the following error[1]
>
> I do not have any other Haskell package in my profile
>
>
> [1]:
> ```
> GHCi, version 8.6.5: http://www.haskell.org/ghc/  :? for help
>
> <interactive>:1:6: error:
>     Not in scope: ‘System.IO.hSetBuffering’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:30: error:
>     Not in scope: ‘System.IO.stdin’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:46: error:
>     Not in scope: data constructor ‘System.IO.NoBuffering’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:70: error:
>     Not in scope: ‘System.IO.hSetBuffering’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:94: error:
>     Not in scope: ‘System.IO.stdout’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:111: error:
>     Not in scope: data constructor ‘System.IO.NoBuffering’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:135: error:
>     Not in scope: ‘System.IO.hSetBuffering’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:159: error:
>     Not in scope: ‘System.IO.stderr’
>     No module named ‘System.IO’ is imported.
>
> <interactive>:1:176: error:
>     Not in scope: data constructor ‘System.IO.NoBuffering’
>     No module named ‘System.IO’ is imported.
> ```
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> ghci can't find System.IO
>
>
>
>
> Date: 
>
> Wed, 10 Jun 2020 23:25:27 -0500
>
>
>
>
> Hello.
>
> Found the ghc reported to have issues:
> https://ci.guix.gnu.org/build/1567747/details
>
> Going back in time to the commit that corresponds
> with the ghc that was reported to be broken:
> -----
> $ guix time-machine --commit=caa366ec230ccc42f5c8d90d36e8cac933053a81 \
> -- environment --pure --ad-hoc ghc
>
> [env]$ ghci
> GHCi, version 8.6.5: http://www.haskell.org/ghc/  :? for help
>
> <interactive>:1:6: error:
>     Not in scope: `System.IO.hSetBuffering'
>     No module named `System.IO' is imported.
>
> <interactive>:1:30: error:
>     Not in scope: `System.IO.stdin'
>     No module named `System.IO' is imported.
> ...
> ...
> -----
> It was indeed broken.
>
> I believe 83aa6562173e06e8fafd4857a2e708feabfe56f8 fixed this.
> Validating that ghci can actually start properly now
> with a current version of guix:
> -----
> $ guix --version
> guix (GNU Guix) 2971ed57345ee4e00058efeaf27c6a0790fdc9dd
>
> $ guix environment --pure --ad-hoc ghc -- ghci
> GHCi, version 8.6.5: http://www.haskell.org/ghc/  :? for help
> Prelude> 1 + 2
> 3
> -----
>
> Going to go ahead and close.
>
>
> --- End Message ---