ghc-8.8.x can't compile default_typeclass.n.hs

peti commented 5 years ago

ghc-8.8.1-alpha-2 cannot compile the alex-3.2.4 test suite:

    default_typeclass.x:285:5: error:
        ‘fail’ is not a (visible) method of class ‘Monad’
        |
    285 |     fail str = StateT $ \_ -> fail str
        |     ^^^^
    make: *** [Makefile:61: default_typeclass.n.bin] Error 1
    /home/abuild/rpmbuild/BUILDROOT/alex-3.2.4-ghc88.1.2.x86_64/usr/bin/alex  -g default_typeclass.x -o default_typeclass.g.hs
    ghc -Wall -fno-warn-missing-signatures -fno-warn-unused-imports -fno-warn-tabs -Werror -package array -package bytestring  default_typeclass.g.hs -o default_typeclass.g.bin
    [1 of 1] Compiling Main             ( default_typeclass.g.hs, default_typeclass.g.o )

    default_typeclass.x:285:5: error:
        ‘fail’ is not a (visible) method of class ‘Monad’
        |
    285 |     fail str = StateT $ \_ -> fail str
        |     ^^^^
    make: *** [Makefile:61: default_typeclass.g.bin] Error 1

peti commented 5 years ago

Ping?

josephcsible commented 5 years ago

This was fixed by #143.

luc-tielen commented 5 years ago

Can a (patch?) release be made for this?

peti commented 5 years ago

Ping?

A new release that contains this fix would be really nice! Currently, distributors that want to use ghc-8.8.1 are spending lots of time, wondering about the problem, googling, eventually finding the ticket on Github, manually applying the patch to their distribution, and testing the modified package. This is a very inefficent use of resources. :-(

If time constraints don't allow making the new release right now, then I'd volunteer to do it. I'd need upload access to Hackage, obviously, then I could release a fixed version.

simonmar commented 4 years ago

Done

haskell / alex

ghc-8.8.x can't compile default_typeclass.n.hs #140