CI sometimes passes when it fails

[certik]

This is an example where LPython clearly failed:

https://github.com/lcompilers/lpython/runs/5671467982?check_suite_focus=true

But the CI succeeded... So we need to

• reproduce this
• figure out why it happens
• fix it

[Smit-create]

This seems to be fixed now.

[certik]

Yes, I think this was fixed by #299.