bug#34227: closed (Non-deterministic GHC build errors)

[GNU bug Tracking System]

Your message dated Sat, 21 Jan 2023 13:39:18 +0100
with message-id <Y8vc9p0VAomI2KBM@noor.fritz.box>
and subject line Re: Non-deterministic GHC build errors
has caused the debbugs.gnu.org bug report #34227,
regarding Non-deterministic GHC build errors
to be marked as done.

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-- 
34227: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34227
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> --- Begin Message ---
>
>
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> Subject: 
>
> Non-deterministic GHC build errors
>
>
>
>
> Date: 
>
> Sun, 27 Jan 2019 22:52:52 +0100
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>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)
>
>
>
>
> Hello,
>
> I’ve noticed something really unexpected: take a Haskell package, say
> ‘ghc-libmpd’, build it several times (with --rounds or --check), and
> notice that sometimes it will build successfully, and other times,
> you’ll get a compiler error like this:
>
> --8<---------------cut here---------------start------------->8---
> Configuring libmpd-0.9.0.9...
> phase `configure' succeeded after 0.9 seconds
> starting phase `patch-generated-file-shebangs'
> phase `patch-generated-file-shebangs' succeeded after 0.0 seconds
> starting phase `build'
> running "runhaskell Setup.hs" with command "build" and parameters ()
> Preprocessing library for libmpd-0.9.0.9..
> Building library for libmpd-0.9.0.9..
> [ 1 of 36] Compiling Network.MPD.Core.Error ( src/Network/MPD/Core/Error.hs, 
> dist/build/Network/MPD/Core/Error.o )
>
> src/Network/MPD/Core/Error.hs:18:1: warning: [-Wdeprecations]
>     Module ‘Control.Monad.Error’ is deprecated:
>       Use "Control.Monad.Except" instead
>    |
> 18 | import           Control.Monad.Error (Error(..))
>    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> src/Network/MPD/Core/Error.hs:48:10: warning: [-Wdeprecations]
>     In the use of type constructor or class ‘Error’
>     (imported from Control.Monad.Error, but defined in 
> transformers-0.5.5.0:Control.Monad.Trans.Error):
>     Deprecated: "Use Control.Monad.Trans.Except instead"
>    |
> 48 | instance Error MPDError where
>    |          ^^^^^
>
> src/Network/MPD/Core/Error.hs:48:10: warning: [-Wdeprecations]
>     In the use of type constructor or class ‘Error’
>     (imported from Control.Monad.Error, but defined in 
> transformers-0.5.5.0:Control.Monad.Trans.Error):
>     Deprecated: "Use Control.Monad.Trans.Except instead"
>    |
> 48 | instance Error MPDError where
>    |          ^^^^^
> [ 2 of 36] Compiling Network.MPD.Core.Class ( src/Network/MPD/Core/Class.hs, 
> dist/build/Network/MPD/Core/Class.o )
>
> src/Network/MPD/Core/Class.hs:17:1: warning: [-Wdeprecations]
>     Module ‘Control.Monad.Error’ is deprecated:
>       Use "Control.Monad.Except" instead
>    |
> 17 | import           Control.Monad.Error (MonadError)
>    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> [ 3 of 36] Compiling Network.MPD.Util ( src/Network/MPD/Util.hs, 
> dist/build/Network/MPD/Util.o )
> --8<---------------cut here---------------end--------------->8---
>
> That seems surreal to me.
>
> Thoughts?
>
> Ludo’.
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: Non-deterministic GHC build errors
>
>
>
>
> Date: 
>
> Sat, 21 Jan 2023 13:39:18 +0100
>
>
>
>
> None of these are actual errors, but warnings. I’ve built a ton of
> Haskell packages and never encountered transient errors.
>
>
> --- End Message ---