Startup error: occasional "AssertionError: Cannot find component 'SSL' for 'OpenSSL.SSL.Context'"

[jvanasco]

I have been getting an odd/flaky mypy bug in a specific environment on Mac OSx. I am hoping someone can point me in the direction to better troubleshoot it and make a proper report.

MyPy crashes on start with this; full details are below:

  File "mypy/lookup.py", line 53, in lookup_fully_qualified
AssertionError: Cannot find component 'SSL' for 'OpenSSL.SSL.Context'

Assuming I have the following filepath:

/project/src/level1/level2/level3/foo.py

Running mypy on the following will trigger the issue:

/project/src/level1/level2/level3/*.py
/project/src/level1/level2/level3
/project/src/level1/level2

Running mypy on the following will NOT trigger the issue:

/project/src/level1
/project/src
/project

Somehow broadening scope fixes this(?!?)

I uninstalled and reinstalled MyPy and pyopenssl, no luck.

I uninstalled and reinstalled MyPy with --no-binary to start pdb debugging against, but can't figure out where anything involved in triggering this is picked up from.

If anyone can offer a suggestion on where I can start poking around, I would be very appreciative. I've lost a quite bit of efficiency today.

Thanks!

    main()
  File "mypy/main.py", line 127, in main
  File "mypy/main.py", line 211, in run_build
  File "mypy/build.py", line 191, in build
  File "mypy/build.py", line 267, in _build
  File "mypy/build.py", line 2939, in dispatch
  File "mypy/build.py", line 3330, in process_graph
  File "mypy/build.py", line 3411, in process_fresh_modules
  File "mypy/build.py", line 2107, in fix_cross_refs
  File "mypy/fixup.py", line 52, in fixup_module
  File "mypy/fixup.py", line 157, in visit_symbol_table
  File "mypy/fixup.py", line 72, in visit_type_info
  File "mypy/fixup.py", line 159, in visit_symbol_table
  File "mypy/nodes.py", line 965, in accept
  File "mypy/fixup.py", line 183, in visit_decorator
  File "mypy/nodes.py", line 851, in accept
  File "mypy/fixup.py", line 167, in visit_func_def
  File "mypy/types.py", line 2028, in accept
  File "mypy/fixup.py", line 269, in visit_callable_type
  File "mypy/types.py", line 2991, in accept
  File "mypy/fixup.py", line 361, in visit_union_type
  File "mypy/types.py", line 1488, in accept
  File "mypy/fixup.py", line 233, in visit_instance
  File "mypy/fixup.py", line 370, in lookup_fully_qualified_typeinfo
  File "mypy/lookup.py", line 53, in lookup_fully_qualified
AssertionError: Cannot find component 'SSL' for 'OpenSSL.SSL.Context'