This is precisely the problem I was worried about in April.
https://mail.haskell.org/pipermail/ghc-devs/2019-April/017493.html
Any fix should ensure adding a test to make sure it doesn't happen again.
Cheers,
Matt
On Mon, Sep 16, 2019 at 10:38 PM Shayne Fletcher via ghc-devs
wrote:
>
> Hi Seb
Hmm. The issue of build parallelism is kind-of orthogonal to .hs-boot
files/circular imports.
The impact of .hs-boot files on build parallelism depends on their
announced imports; at least in my semantic model of them (which might be
incorrect) they just break cycles.
The degree of parallelism is
Shayne,
out of curiosity, could you find out which of the three modules DsMonad,
FamInst and TcSimplify lead to the blowup? If it's not too much of a
hassle, that is.
These are the only imports of PmOracle that aren't already exported from
ghc-lib-parser.
Cheers,
Sebastian
Am Mo., 16. Sept. 2019
Seeing what I can do.
On Tue, Sep 17, 2019 at 10:31 AM Sebastian Graf wrote:
> Shayne,
>
> out of curiosity, could you find out which of the three modules DsMonad,
> FamInst and TcSimplify lead to the blowup? If it's not too much of a
> hassle, that is.
> These are the only imports of PmOracle t
My question arrised in the following context:
```
module ForEachHelper where
import Data.Kind
import GHC.TypeLits
type family ForEach (c :: k -> Constraint) (xs :: [k]) :: Constraint where
ForEach c '[] = ()
ForEach c (x:xs) = (c x, ForEach c xs)
type family Replicate n x where
Repl
Getting you some raw data to look at but first results indicate at least
that `DsMonad` is pulling in `nativeGen`, `llvmGen`, `stgToCmm`,
`simplCore`, `hieFile` and so on.
On Tue, Sep 17, 2019 at 12:05 PM Shayne Fletcher
wrote:
> Seeing what I can do.
>
> On Tue, Sep 17, 2019 at 10:31 AM Sebasti
Excellent work Sebastian. I confirm that the situation is resolved by
https://gitlab.haskell.org/ghc/ghc/merge_requests/1743.
On Mon, Sep 16, 2019 at 5:23 PM Sebastian Graf wrote:
> Hi Shayne,
>
> Sorry to hear that! We didn't consider modularity at all and I would be
> happy to try to refactor
I'm not sure if this is directly relevant to your issues around
GHC.Classes.(%,%), but there are some issues with using tuples for
Constraints. Namely that they can only be fully applied, and do not exist
naked as
(,) :: Constraint -> Constraint -> Constraint.
With UndecidableInstances, etc. you
