All Questions
Tagged with haskell haskell-stack
1,139 questions
0
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39
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"Could not find module ‘GHCi.GhcApiCompat’." which installing `haskell-dap ghci-dap`
Below are my ghcup config -
I've I've created haskell project using stack with command stack new stack-hls-dbg-demo.
I then updated snapshot.url as below so that it uses ghc-9.10.1-
snapshot:
url: ...
- 10.3k
1
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0
answers
56
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Couldn't find a working/matching GHC installation. Consider installing ghc-9.10.1 via ghcup or build HLS from source
I've ghcup installed in my machine.
Below are my ghcup installation details -
I verified the same in command line as well.
Then I created a new haskell project using stack 3.3.1 with the command ...
- 10.3k
1
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0
answers
36
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Haskell static compiled so file where haskell runtime shared library that can be accessed through ffi [closed]
I want to write a haskell program that get exposed through FFI, uses fpic and system-ffi and create a single so file so that the haskell runtime and deps are all packaged into a single object, when ...
- 11
4
votes
1
answer
88
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How to Free Resources Allocated During Debugging in GHC or Stack Debugger?
I'm debugging a Haskell program using GHC's debugger (ghci) or via stack ghci, specifically with the Haskell GHCi Debug Adapter (Phoityne extension) in Visual Studio Code, and I'm encountering a major ...
1
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1
answer
687
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Error occured while (re-)installing GHC and setting up the VSCode Haskell Plugin
I was trying to setup the Haskell Plugin for VSCode and I had two seperate problems while trying.
First: The original error I faced while setting up the Haskell Plugin in VSCode was:
HLS does not ...
- 13
2
votes
1
answer
34
views
How can I suppress the error summary at the bottom of `stack test`
I like to have stack test --file-watch running in a terminal below my editor so when I make a change and save, it reruns my tests and gives feedback. However, in the output below, everything after the ...
- 8,233
0
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1
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50
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VS Code shows dummy errors despite successful builds; restarting VS Code temporarily resolves the issue—suggestions?
I’m encountering some wrong errors in Haskell while coding in VS Code, such as "not in scope," "not imported-exported" or "package not found." To fix this, I have to quit ...
0
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1
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53
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Stack tried to find libgmp then failed, even with no dependencies at all
I use nix-darwin and have enabled nix in ~/.stack/config.yaml.
Earlier today I did a sudo nix-collect-garbage -d then many things begin to break.
Minimum reproducible example:
stack new mwe
cd mwe
...
- 685
1
vote
1
answer
42
views
hint runStmt no output when redirected
Following this link and trying to stack run this module:
module Main where
import Language.Haskell.Interpreter
main :: IO ()
main = do
_ <- runInterpreter
$ setImports ["Prelude"]...
- 55
0
votes
0
answers
80
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Haskell program not finding student in database despite correct ID
I'm encountering an issue with my Haskell program where it's unable to find a student in the database despite providing the correct student ID.
Details:
Objective: My program is designed to search for ...
- 19
0
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0
answers
84
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Haskell, Stack, importing module shows error "Module not found" [duplicate]
If i write import in .hs file, it pops error saying no module found for "Lib" and "import Numeric.LinearAlgebra ( (><), linearSolve )". Also i got error saying ambiguous type....
1
vote
1
answer
100
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Stack error when running benchmarks (tasty-bench)
I try to include some benchmarks in my Haskell package and running stack bench generates an error:
Benchmark benchmarks: RUNNING...
All
Fibonacci numbers
fifth: OK (4.28s)
247 ns ± ...
- 84.9k
0
votes
1
answer
90
views
How to specify c/c++ compiler on stack install command
I'm learning Haskell and I'm setting up my system for development.
I'm on MacOS and trying to install hoogle locally with stack install hoogle fails because the compilation of some libraries fails ...
- 25
0
votes
1
answer
183
views
Is it safe to downgrade Haskell stack version?
Suppose I'd like to build an old stack project from GitHub (which uses snapshot before lts-12.0), can I build it with latest stack? I did some experiments as follows.
For example, hpack-convert uses ...
- 1,429
2
votes
1
answer
175
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What am I doing wrong in my Haskell library installation/usage?
I want to install and run an example program from the Haskell neural library.
I'm pretty new to this and am not sure on whether the issue is with my installation method, my environment or the library(...
