Install with cabal fails with ghc 9.0.1, ghc 8.10.5 OK

Install with cabal fails with ghc 9.0.1, ghc 8.10.5 OK

[krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]

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As Manjaro (Arch derivative) user learning Haskell I am a little struggling 
to set up functional environment for working with Haskell. Currently, I 
have landed on using `ghcup` + `cabal` to manage everything haskell 
related. I have good experience with `rustup` + `cargo`, so I hope my 
experience with `ghcup` will be also "UP."

With that, I am landing on compiling pandoc from source, not downloading 
binary package. Compilation with ghc v. 8.10.5 works as expected, but with 
ghc 9.0.1 (latest I believe) it fails with this output:

```
Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: pandoc-2.14.0.2 (user goal)
[__1] trying: unicode-collation-0.1.3 (dependency of pandoc)
[__2] trying: template-haskell-2.17.0.0/installed-2.17.0.0 (dependency of
unicode-collation)
[__3] trying: skylighting-core-0.10.5.1 (dependency of pandoc)
[__4] trying: transformers-0.5.6.2/installed-0.5.6.2 (dependency of
skylighting-core)
[__5] trying: containers-0.6.4.1/installed-0.6.4.1 (dependency of pandoc)
[__6] trying: base-4.15.0.0/installed-4.15.0.0 (dependency of pandoc)
[__7] trying: pandoc-crossref-0.3.11.0 (user goal)
[__8] next goal: data-accessor-template (dependency of pandoc-crossref)
[__8] rejecting: data-accessor-template-0.2.1.16 (conflict:
template-haskell==2.17.0.0/installed-2.17.0.0, data-accessor-template =>
template-haskell>=2.11 && <2.17)
[__8] skipping: data-accessor-template-0.2.1.15,
data-accessor-template-0.2.1.14, data-accessor-template-0.2.1.13,
data-accessor-template-0.2.1.12, data-accessor-template-0.2.1.11,
data-accessor-template-0.2.1.10, data-accessor-template-0.2.1.9,
data-accessor-template-0.2.1.8, data-accessor-template-0.2.1.7,
data-accessor-template-0.2.1.6, data-accessor-template-0.2.1.5,
data-accessor-template-0.2.1.4, data-accessor-template-0.2.1.3,
data-accessor-template-0.2.1.2, data-accessor-template-0.2.1.1,
data-accessor-template-0.2.1, data-accessor-template-0.2,
data-accessor-template-0.1.4, data-accessor-template-0.1.3,
data-accessor-template-0.1.2, data-accessor-template-0.1.1 (has the same
characteristics that caused the previous version to fail: excludes
'template-haskell' version 2.17.0.0)
[__8] fail (backjumping, conflict set: data-accessor-template,
pandoc-crossref, template-haskell)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: pandoc, yaml, pandoc-crossref, base,
template-haskell, data-accessor-template, transformers, skylighting-core,
containers, unicode-collation
Try running with --minimize-conflict-set to improve the error message.
```

Is it known state of things, or is it some error on my side?
Thanks in advance for any guidance in this, regards
Tomas

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Re: Install with cabal fails with ghc 9.0.1, ghc 8.10.5 OK

[John MacFarlane]

We do CI with ghc 9.0.1, so the builds are confirmed to work.
Try

cabal clean
cabal update
cabal build

Are you using up-to-date cabal?

"krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org" <krulis.tomas.tk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> As Manjaro (Arch derivative) user learning Haskell I am a little struggling 
> to set up functional environment for working with Haskell. Currently, I 
> have landed on using `ghcup` + `cabal` to manage everything haskell 
> related. I have good experience with `rustup` + `cargo`, so I hope my 
> experience with `ghcup` will be also "UP."
>
> With that, I am landing on compiling pandoc from source, not downloading 
> binary package. Compilation with ghc v. 8.10.5 works as expected, but with 
> ghc 9.0.1 (latest I believe) it fails with this output:
>
> ```
> Resolving dependencies...
> cabal: Could not resolve dependencies:
> [__0] trying: pandoc-2.14.0.2 (user goal)
> [__1] trying: unicode-collation-0.1.3 (dependency of pandoc)
> [__2] trying: template-haskell-2.17.0.0/installed-2.17.0.0 (dependency of
> unicode-collation)
> [__3] trying: skylighting-core-0.10.5.1 (dependency of pandoc)
> [__4] trying: transformers-0.5.6.2/installed-0.5.6.2 (dependency of
> skylighting-core)
> [__5] trying: containers-0.6.4.1/installed-0.6.4.1 (dependency of pandoc)
> [__6] trying: base-4.15.0.0/installed-4.15.0.0 (dependency of pandoc)
> [__7] trying: pandoc-crossref-0.3.11.0 (user goal)
> [__8] next goal: data-accessor-template (dependency of pandoc-crossref)
> [__8] rejecting: data-accessor-template-0.2.1.16 (conflict:
> template-haskell==2.17.0.0/installed-2.17.0.0, data-accessor-template =>
> template-haskell>=2.11 && <2.17)
> [__8] skipping: data-accessor-template-0.2.1.15,
> data-accessor-template-0.2.1.14, data-accessor-template-0.2.1.13,
> data-accessor-template-0.2.1.12, data-accessor-template-0.2.1.11,
> data-accessor-template-0.2.1.10, data-accessor-template-0.2.1.9,
> data-accessor-template-0.2.1.8, data-accessor-template-0.2.1.7,
> data-accessor-template-0.2.1.6, data-accessor-template-0.2.1.5,
> data-accessor-template-0.2.1.4, data-accessor-template-0.2.1.3,
> data-accessor-template-0.2.1.2, data-accessor-template-0.2.1.1,
> data-accessor-template-0.2.1, data-accessor-template-0.2,
> data-accessor-template-0.1.4, data-accessor-template-0.1.3,
> data-accessor-template-0.1.2, data-accessor-template-0.1.1 (has the same
> characteristics that caused the previous version to fail: excludes
> 'template-haskell' version 2.17.0.0)
> [__8] fail (backjumping, conflict set: data-accessor-template,
> pandoc-crossref, template-haskell)
> After searching the rest of the dependency tree exhaustively, these were the
> goals I've had most trouble fulfilling: pandoc, yaml, pandoc-crossref, base,
> template-haskell, data-accessor-template, transformers, skylighting-core,
> containers, unicode-collation
> Try running with --minimize-conflict-set to improve the error message.
> ```
>
> Is it known state of things, or is it some error on my side?
> Thanks in advance for any guidance in this, regards
> Tomas
>
> -- 
> You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
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Re: Install with cabal fails with ghc 9.0.1, ghc 8.10.5 OK

[krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]

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I am using cabal v. 3.4.0.0.

I have tested commands you provided.

```
cabal clean
cabal update
```

runs through OK, `cabal build` asks me for `cabal.project` file. I might 
have written misleading information -- I was using command:

```
cabal install pandoc pandoc-crossref
```

I was not compiling repo clone directly from source (thats how I would get 
the `cabal.project` file, correct?)
This `cabal install` command runs through with ghc 8.10.5, but fails with 
ghc 9.0.1. The reported error seems very strange to me, because if I 
understand correctly, cabal is for some reason trying to use very old 
version of `data-accessor` package ... ?
Let me know if I should move my question elsewhere (reddit, SO, cabal 
issues), this seems mostly like some hidden hickup in my setup ...

Addendum: Haskell setup

I am using `ghcup` to get haskell running. I have moved on it recently. 
Before then, I was using Manjaro stable repo to get pandoc and 
pandoc-crossref, but that becomes clunky when I want to make new projects 
with cabal (at least to me).

1. I removed pandoc, pandoc-crossref, ghc, ghc-static and cabal-install 
from my packages
2. I removed orphaned packages, mostly haskell libraries installed by 
Manjaro. I have no idea whether I have still some installed. If that might 
be the cause, please let me know. As system package, I was having installed 
ghc 8.10.5, but searching packages with pacman gives me no haskell-* 
packages, as they are named in Manjaro/Arch
3. I installed ghcup from here: https://www.haskell.org/ghcup/
4. I installed cabal (and stack) with ghcup
5. I installed pandoc and pandoc-crossref, all went OK, because ghcup seems 
to use ghc 8.10.5 as default for new installation
6. I noticed warning message from ghcup, that there is newer ghc version. I 
installed it with ghcup and set it as my new default
7. I deleteted `$HOME/.ghc` and `$HOME/.cabal` folders, since reportedly 
they cause issues after upgrading ghc or cabal
8. I ran `cabal update`
9. I repeated `cabal install pandoc pandoc-crossref` (with active ghc v. 
9.0.1) but it throws error I posted in the beginning.
Dne středa 16. června 2021 v 0:17:13 UTC+2 uživatel John MacFarlane napsal:

>
> We do CI with ghc 9.0.1, so the builds are confirmed to work.
> Try
>
> cabal clean
> cabal update
> cabal build
>
> Are you using up-to-date cabal?
>
> "krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org" <krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>
> > As Manjaro (Arch derivative) user learning Haskell I am a little 
> struggling 
> > to set up functional environment for working with Haskell. Currently, I 
> > have landed on using `ghcup` + `cabal` to manage everything haskell 
> > related. I have good experience with `rustup` + `cargo`, so I hope my 
> > experience with `ghcup` will be also "UP."
> >
> > With that, I am landing on compiling pandoc from source, not downloading 
> > binary package. Compilation with ghc v. 8.10.5 works as expected, but 
> with 
> > ghc 9.0.1 (latest I believe) it fails with this output:
> >
> > ```
> > Resolving dependencies...
> > cabal: Could not resolve dependencies:
> > [__0] trying: pandoc-2.14.0.2 (user goal)
> > [__1] trying: unicode-collation-0.1.3 (dependency of pandoc)
> > [__2] trying: template-haskell-2.17.0.0/installed-2.17.0.0 (dependency of
> > unicode-collation)
> > [__3] trying: skylighting-core-0.10.5.1 (dependency of pandoc)
> > [__4] trying: transformers-0.5.6.2/installed-0.5.6.2 (dependency of
> > skylighting-core)
> > [__5] trying: containers-0.6.4.1/installed-0.6.4.1 (dependency of pandoc)
> > [__6] trying: base-4.15.0.0/installed-4.15.0.0 (dependency of pandoc)
> > [__7] trying: pandoc-crossref-0.3.11.0 (user goal)
> > [__8] next goal: data-accessor-template (dependency of pandoc-crossref)
> > [__8] rejecting: data-accessor-template-0.2.1.16 (conflict:
> > template-haskell==2.17.0.0/installed-2.17.0.0, data-accessor-template =>
> > template-haskell>=2.11 && <2.17)
> > [__8] skipping: data-accessor-template-0.2.1.15,
> > data-accessor-template-0.2.1.14, data-accessor-template-0.2.1.13,
> > data-accessor-template-0.2.1.12, data-accessor-template-0.2.1.11,
> > data-accessor-template-0.2.1.10, data-accessor-template-0.2.1.9,
> > data-accessor-template-0.2.1.8, data-accessor-template-0.2.1.7,
> > data-accessor-template-0.2.1.6, data-accessor-template-0.2.1.5,
> > data-accessor-template-0.2.1.4, data-accessor-template-0.2.1.3,
> > data-accessor-template-0.2.1.2, data-accessor-template-0.2.1.1,
> > data-accessor-template-0.2.1, data-accessor-template-0.2,
> > data-accessor-template-0.1.4, data-accessor-template-0.1.3,
> > data-accessor-template-0.1.2, data-accessor-template-0.1.1 (has the same
> > characteristics that caused the previous version to fail: excludes
> > 'template-haskell' version 2.17.0.0)
> > [__8] fail (backjumping, conflict set: data-accessor-template,
> > pandoc-crossref, template-haskell)
> > After searching the rest of the dependency tree exhaustively, these were 
> the
> > goals I've had most trouble fulfilling: pandoc, yaml, pandoc-crossref, 
> base,
> > template-haskell, data-accessor-template, transformers, skylighting-core,
> > containers, unicode-collation
> > Try running with --minimize-conflict-set to improve the error message.
> > ```
> >
> > Is it known state of things, or is it some error on my side?
> > Thanks in advance for any guidance in this, regards
> > Tomas
> >
> > -- 
> > You received this message because you are subscribed to the Google 
> Groups "pandoc-discuss" group.
> > To unsubscribe from this group and stop receiving emails from it, send 
> an email to pandoc-discus...-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
> > To view this discussion on the web visit 
> https://groups.google.com/d/msgid/pandoc-discuss/649e1e26-1e08-4d95-a69f-8ee88d4643f7n%40googlegroups.com
> .
>

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Re: Install with cabal fails with ghc 9.0.1, ghc 8.10.5 OK

[krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]

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The issue was with pandoc-crossref.
Apparently, it doesnt suppor ghc 9.0 yet, per this 
issue: https://github.com/lierdakil/pandoc-crossref/issues/312

I am very sorry for reporting it here, I am used to install both programs 
together, since they are closely tied up, and only after guidance from 
cabal team I connected the dots.

Dne středa 16. června 2021 v 7:47:03 UTC+2 uživatel krulis....@gmail.com 
napsal:

> I am using cabal v. 3.4.0.0.
>
> I have tested commands you provided.
>
> ```
> cabal clean
> cabal update
> ```
>
> runs through OK, `cabal build` asks me for `cabal.project` file. I might 
> have written misleading information -- I was using command:
>
> ```
> cabal install pandoc pandoc-crossref
> ```
>
> I was not compiling repo clone directly from source (thats how I would get 
> the `cabal.project` file, correct?)
> This `cabal install` command runs through with ghc 8.10.5, but fails with 
> ghc 9.0.1. The reported error seems very strange to me, because if I 
> understand correctly, cabal is for some reason trying to use very old 
> version of `data-accessor` package ... ?
> Let me know if I should move my question elsewhere (reddit, SO, cabal 
> issues), this seems mostly like some hidden hickup in my setup ...
>
> Addendum: Haskell setup
>
> I am using `ghcup` to get haskell running. I have moved on it recently. 
> Before then, I was using Manjaro stable repo to get pandoc and 
> pandoc-crossref, but that becomes clunky when I want to make new projects 
> with cabal (at least to me).
>
> 1. I removed pandoc, pandoc-crossref, ghc, ghc-static and cabal-install 
> from my packages
> 2. I removed orphaned packages, mostly haskell libraries installed by 
> Manjaro. I have no idea whether I have still some installed. If that might 
> be the cause, please let me know. As system package, I was having installed 
> ghc 8.10.5, but searching packages with pacman gives me no haskell-* 
> packages, as they are named in Manjaro/Arch
> 3. I installed ghcup from here: https://www.haskell.org/ghcup/
> 4. I installed cabal (and stack) with ghcup
> 5. I installed pandoc and pandoc-crossref, all went OK, because ghcup 
> seems to use ghc 8.10.5 as default for new installation
> 6. I noticed warning message from ghcup, that there is newer ghc version. 
> I installed it with ghcup and set it as my new default
> 7. I deleteted `$HOME/.ghc` and `$HOME/.cabal` folders, since reportedly 
> they cause issues after upgrading ghc or cabal
> 8. I ran `cabal update`
> 9. I repeated `cabal install pandoc pandoc-crossref` (with active ghc v. 
> 9.0.1) but it throws error I posted in the beginning.
> Dne středa 16. června 2021 v 0:17:13 UTC+2 uživatel John MacFarlane napsal:
>
>>
>> We do CI with ghc 9.0.1, so the builds are confirmed to work. 
>> Try 
>>
>> cabal clean 
>> cabal update 
>> cabal build 
>>
>> Are you using up-to-date cabal? 
>>
>> "krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org" <krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes: 
>>
>> > As Manjaro (Arch derivative) user learning Haskell I am a little 
>> struggling 
>> > to set up functional environment for working with Haskell. Currently, I 
>> > have landed on using `ghcup` + `cabal` to manage everything haskell 
>> > related. I have good experience with `rustup` + `cargo`, so I hope my 
>> > experience with `ghcup` will be also "UP." 
>> > 
>> > With that, I am landing on compiling pandoc from source, not 
>> downloading 
>> > binary package. Compilation with ghc v. 8.10.5 works as expected, but 
>> with 
>> > ghc 9.0.1 (latest I believe) it fails with this output: 
>> > 
>> > ``` 
>> > Resolving dependencies... 
>> > cabal: Could not resolve dependencies: 
>> > [__0] trying: pandoc-2.14.0.2 (user goal) 
>> > [__1] trying: unicode-collation-0.1.3 (dependency of pandoc) 
>> > [__2] trying: template-haskell-2.17.0.0/installed-2.17.0.0 (dependency 
>> of 
>> > unicode-collation) 
>> > [__3] trying: skylighting-core-0.10.5.1 (dependency of pandoc) 
>> > [__4] trying: transformers-0.5.6.2/installed-0.5.6.2 (dependency of 
>> > skylighting-core) 
>> > [__5] trying: containers-0.6.4.1/installed-0.6.4.1 (dependency of 
>> pandoc) 
>> > [__6] trying: base-4.15.0.0/installed-4.15.0.0 (dependency of pandoc) 
>> > [__7] trying: pandoc-crossref-0.3.11.0 (user goal) 
>> > [__8] next goal: data-accessor-template (dependency of pandoc-crossref) 
>> > [__8] rejecting: data-accessor-template-0.2.1.16 (conflict: 
>> > template-haskell==2.17.0.0/installed-2.17.0.0, data-accessor-template 
>> => 
>> > template-haskell>=2.11 && <2.17) 
>> > [__8] skipping: data-accessor-template-0.2.1.15, 
>> > data-accessor-template-0.2.1.14, data-accessor-template-0.2.1.13, 
>> > data-accessor-template-0.2.1.12, data-accessor-template-0.2.1.11, 
>> > data-accessor-template-0.2.1.10, data-accessor-template-0.2.1.9, 
>> > data-accessor-template-0.2.1.8, data-accessor-template-0.2.1.7, 
>> > data-accessor-template-0.2.1.6, data-accessor-template-0.2.1.5, 
>> > data-accessor-template-0.2.1.4, data-accessor-template-0.2.1.3, 
>> > data-accessor-template-0.2.1.2, data-accessor-template-0.2.1.1, 
>> > data-accessor-template-0.2.1, data-accessor-template-0.2, 
>> > data-accessor-template-0.1.4, data-accessor-template-0.1.3, 
>> > data-accessor-template-0.1.2, data-accessor-template-0.1.1 (has the 
>> same 
>> > characteristics that caused the previous version to fail: excludes 
>> > 'template-haskell' version 2.17.0.0) 
>> > [__8] fail (backjumping, conflict set: data-accessor-template, 
>> > pandoc-crossref, template-haskell) 
>> > After searching the rest of the dependency tree exhaustively, these 
>> were the 
>> > goals I've had most trouble fulfilling: pandoc, yaml, pandoc-crossref, 
>> base, 
>> > template-haskell, data-accessor-template, transformers, 
>> skylighting-core, 
>> > containers, unicode-collation 
>> > Try running with --minimize-conflict-set to improve the error message. 
>> > ``` 
>> > 
>> > Is it known state of things, or is it some error on my side? 
>> > Thanks in advance for any guidance in this, regards 
>> > Tomas 
>> > 
>> > -- 
>> > You received this message because you are subscribed to the Google 
>> Groups "pandoc-discuss" group. 
>> > To unsubscribe from this group and stop receiving emails from it, send 
>> an email to pandoc-discus...-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org 
>> > To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/pandoc-discuss/649e1e26-1e08-4d95-a69f-8ee88d4643f7n%40googlegroups.com. 
>>
>>
>

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