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transient-haskell / transient

A full stack, reactive architecture for general purpose programming. Algebraic and monadically composable primitives for concurrency, parallelism, event handling, transactions, multithreading, Web, and distributed computing with complete de-inversion of control (No callbacks, no blocking, pure state)
MIT License
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Fails to build with GHC 8.6.4 #78

Closed gvolpe closed 5 years ago

gvolpe commented 5 years ago

Hi,

I'm trying to get transient working but unfortunately I get this error:

Configuring library for transient-0.6.0.1..
Preprocessing library for transient-0.6.0.1..
Building library for transient-0.6.0.1..
[1 of 7] Compiling Transient.Internals ( src/Transient/Internals.hs, dist/build/Transient/Internals.o )

src/Transient/Internals.hs:368:10: error:
    • Could not deduce (Semigroup (TransIO a))
        arising from the superclasses of an instance declaration
      from the context: Monoid a
        bound by the instance declaration
        at src/Transient/Internals.hs:368:10-39
    • In the instance declaration for ‘Monoid (TransIO a)’
    |
368 | instance Monoid a => Monoid (TransIO a) where
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cabal: Failed to build transient-0.6.0.1 (which is required by
exe:effects-playground from effects-playground-0.1.0.0). See the build log
above for details.

Any ideas on how to solve it?

I have a few other dependencies such as polysemy and fused-effects working.

agocorona commented 5 years ago

Hi @gvolpe which version are you using of transient? Please use the one in github:

https://github.com/transient-haskell/transient

gvolpe commented 5 years ago

I tried with the latest 0.6.0.1, 0.5.9 and also with another older version I can't remember. Always get the same error when running cabal new-build. Here's my cabal file: https://github.com/gvolpe/effects-playground/blob/master/effects-playground.cabal

If I add transient I get such error. Would appreciate any help.

agocorona commented 5 years ago

gvolpe please try the version 0.6.3 which is not in hackage. it is in github

gvolpe commented 5 years ago

Oh that's what you meant! I'll wait until it's published then, no rush. Thanks.