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Created by Javier Neira @jneira

`System.Environment.getEnv` fails in alpine-3.12 and ghc-9.2.1

Summary

System.Environment.getEnv "PATH" fails in alpine-3.12 and ghc-9.2.1 with

PATH: getEnv: does not exist (no environment variable)

in a fresh alpine-3.12 virtual machine and ghc-9.2.1 installed with ghcup

The bug has been discovered in the haskell-lanaguage-server ci (https://github.com/jneira/haskell-language-server/actions/runs/1726024910 / https://github.com/haskell/haskell-language-server/pull/2615) where we've noted:

  • With the same alpine container image all tested ghcs < 9.2.1 work
  • With the same github workflow ubuntu-18.02 works for ghc 9.2.1

Steps to reproduce

https://user-images.githubusercontent.com/54035/150512698-fd444d01-5034-4109-8652-1ec417e37b06.png

The concrete env var does not matter, it happens with $USER, $HOME and other vars known to be set in the environment

Expected behavior

System.Environment.getEnv should return the PATH env var value

Environment

  • GHC version used: 9.2.1

Optional:

  • Operating System: Alpine linux 3.12
  • System Architecture: x86_64
Edited by Javier Neira
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