Skip to content

binary bits doesn't compile on ghc 8.8.1 or later #14

@GeorgeCo

Description

@GeorgeCo

binary bits doesn't compile on ghc 8.8.1 or later:

cabal v1-install binary-bits
Resolving dependencies...
Starting binary-bits-0.5
Building binary-bits-0.5
Failed to install binary-bits-0.5
Build log ( /Users/gcolpitts/.cabal/logs/ghc-8.10.0.20200123/binary-bits-0.5-KnF4JnKbFevEcApL2wyqoN.log ):
cabal: Entering directory '/var/folders/df/5d_dsdrx1dn4j30ktsgn8blh0000gp/T/cabal-tmp-94697/binary-bits-0.5'
Configuring binary-bits-0.5...
Preprocessing library for binary-bits-0.5..
Building library for binary-bits-0.5..
[1 of 3] Compiling Data.Binary.Bits.Get ( Data/Binary/Bits/Get.hs, dist/build/Data/Binary/Bits/Get.o, dist/build/Data/Binary/Bits/Get.dyn_o )

Data/Binary/Bits/Get.hs:345:3: error:
‘fail’ is not a (visible) method of class ‘Monad’
|
345 | fail str = B $ (S inp n) -> putBackState inp n >> fail str
| ^^^^
cabal: Leaving directory '/var/folders/df/5d_dsdrx1dn4j30ktsgn8blh0000gp/T/cabal-tmp-94697/binary-bits-0.5'
cabal: Error: some packages failed to install:
binary-bits-0.5-KnF4JnKbFevEcApL2wyqoN failed during the building phase. The
exception was:
ExitFailure 1

This error is expected with 8.8.1 or later. From https://gitlab.haskell.org/ghc/ghc/wikis/migration/8.8 :

GHC 8.8 implements the final phase of the MonadFail proposal and now does the following:

The fail method of Monad has been removed in favor of the method of the same name in the MonadFail class.

MonadFail(..) is now exported from the Prelude and Control.Monad modules.

The MonadFailDesugaring language extension is now deprecated, as its effects are always enabled.

Also see https://gitlab.haskell.org/ghc/ghc/wikis/proposal/monad-fail#adapting-old-code

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions