[Haskell-beginners] Stack could not find libHStransformers

[Michael Snoyman]

Some ideas:

* What does this output: `which ghc ; stack exec which ghc`
* What does your stack.yaml look like?
* Do you have a .ghci or other kinds of local configuration file?

On Thu, Dec 7, 2017 at 5:42 PM, Quentin Liu <quentin.liu.0415 at gmail.com>
wrote:

> I am using ghc download and managed by stack. My stack is of the latest
> version, which is 1.6.1.
>
> Regards,
> Qingbo Liu
>
> On Dec 7, 2017, 01:56 -0500, Michael Snoyman <michael at snoyman.com>, wrote:
>
> What version of Stack are you using (stack --version), and how did you
> install Stack and GHC?
>
> It looks like you're using a system-wide GHC installation, which (for
> reasons like this) we by default no longer use by default in recent Stack
> releases.
>
> Upgrading to the latest Stack (via `stack upgrade` or following the
> instructions at [1]) will probably solve the problem.
>
> [1] https://haskell-lang.org/get-started/osx
>
> On Thu, Dec 7, 2017 at 8:43 AM, Quentin Liu <quentin.liu.0415 at gmail.com>
> wrote:
>
>> Hi,
>>
>> I was trying to use Parsec and imported Text.ParserCombinators.Parsec. I
>> could call “stack ghc” to compile the file, but when I loaded the file into
>> ghci and called any function, ghci would report errors
>>
>> can't load .so/.DLL for: /Users/HereWegoR/.stack/snapsh
>> ots/x86_64-osx/lts-8.8/8.0.2/lib/x86_64-osx-ghc-8.0.2/
>> libHSmtl-2.2.1-BLKBelFsPB3BoFeSWSOYj6-ghc8.0.2.dylib
>> (dlopen(/Users/HereWegoR/.stack/snapshots/x86_64-osx/lts-8.
>> 8/8.0.2/lib/x86_64-osx-ghc-8.0.2/libHSmtl-2.2.1-BLKBelFsPB3BoFeSWSOYj6-ghc8.0.2.dylib,
>> 5): Library not loaded: /usr/local/opt/ghc/lib/ghc-8.0
>> .2/transformers-0.5.2.0/libHStransformers-0.5.2.0-ghc8.0.2.dylib
>>   Referenced from: /Users/HereWegoR/.stack/snapsh
>> ots/x86_64-osx/lts-8.8/8.0.2/lib/x86_64-osx-ghc-8.0.2/
>> libHSmtl-2.2.1-BLKBelFsPB3BoFeSWSOYj6-ghc8.0.2.dylib
>>   Reason: image not found)
>>
>>
>> I tried to install transformers by calling `stack install transformers`
>> but the problem still persisted. Is it because the version of transformers
>> in my repo is different from the one referenced by `mtl` package? How
>> should I fix it?
>>
>> Regards,
>> Qingbo Liu
>>
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>> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
>>
>>
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