Fix check_env for Sequence observation space

[corentinlger]

Add a condition to check if observation space of an environment is Sequence in the "_check_unsupported_spaces". Add a condition to stop the "check_env" function is this type of obs space is detected (only if warn=True).

Should I solve the issue a different way ?

I had a segmentation fault error while running make pytest.

Description

closes #1683

Motivation and Context

• I have raised an issue to propose this change (required for new features and bug fixes)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)

Checklist

• I've read the CONTRIBUTION guide (required)
• I have updated the changelog accordingly (required).
• My change requires a change to the documentation.
• I have updated the tests accordingly (required for a bug fix or a new feature).
• I have updated the documentation accordingly.
• I have opened an associated PR on the SB3-Contrib repository (if necessary)
• I have opened an associated PR on the RL-Zoo3 repository (if necessary)
• I have reformatted the code using make format (required)
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• I have checked that the documentation builds using make doc (required)

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[araffin]

Hello,

Should I solve the issue a different way ?

looks good but you should add a test.

[corentinlger]

I launched the test and it was ok up until 94%. Then I had a segmentation fault (error 139) :

"""
tests/test_vec_envs.py::test_render[DummyVecEnv] Fatal Python error: Segmentation fault
"""

I didn't see any similar case in the issues. Do you know why it could have happened ? (I already had this problem when I launched the test for another issue)

[araffin]

tests/test_vec_envs.py::test_render[DummyVecEnv] Fatal Python error: Segmentation fault

you can safely ignore that test.

[corentinlger]

looks good but you should add a test.

I am kind of confused about the test you talked about . You meant adding an automatic test in the test_env_checker.py file ?

[araffin]

LGTM, thanks =)

[corentinlger]

You're welcome ! Thanks for the lib (: