Add test for GH #408 PackageRecord error

[maresb]

I'm not sure what's causing #408 but I want to write a test so we can check when it's solved.

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[ogrisel]

I recently observed the KeyError for the __osx package when running a conda-lock with recent mamba & conda installed on my system.

I contributed a fix to the upstream repo that works for me:

• Fix support for the PackageType.VIRTUAL_SYSTEM enum mamba-org/mamba#2923

I am not sure if this is related to this or not.

/cc @lesteve.

[maresb]

Ah, bad news, but thanks for letting us know. Also thanks for submitting the upstream fix! And also for raising visibility on this PR which I meant to merge.

[maresb]

@ogrisel, can you share your environment.yml file which led to the error?

[ogrisel]

@maresb here is the command I used:

conda-lock lock --mamba --kind explicit --platform osx-64 --file build_tools/azure/pylatest_conda_forge_mkl_osx-64_environment.yml --filename-template build_tools/azure/pylatest_conda_forge_mkl_osx-64_conda.lock

and here is the content of pylatest_conda_forge_mkl_osx-64_environment.yml:

channels:
  - conda-forge
dependencies:
  - python
  - numpy
  - blas[build=mkl]
  - scipy
  - cython
  - joblib
  - threadpoolctl
  - matplotlib
  - pandas
  - pyamg
  - pytest
  - pytest-xdist=2.5.0
  - pillow
  - setuptools
  - pytest-cov
  - coverage
  - ccache
  - compilers
  - llvm-openmp

[lesteve]

For the record this command runs fine for me on a Linux machine (conda 23.9.0 mamba 1.5.2 which are the latest releases at the time of writing), so maybe the issue only happens when running the command on an OSX machine?

[ogrisel]

Yes I believe that this might be because the __osx virtual package does not show up on a Linux host.

This is probably a bug of mamba or conda that ignores the --platform osx-64 argument when defining the system specific virtual packages.