1.7.0 regression with mypyc

[mr-c]

Bug Report

Bisected to e1f6d6b from #16268

To Reproduce

git clone https://github.com/common-workflow-language/cwltool
cd cwltool
git checkout dependabot/pip/mypy-1.7.0
make dev
MYPYPATH=mypy-stubs CWLTOOL_USE_MYPYC=1 pip install --verbose -e .
pytest -k '(test_listing_deep or test_cwltool_options or test_passthrough_successive or test_listing_v1_0 or test_disable_dir_overwrite_without_ext or test_disable_dir_creation_in_outdir_with_ext or test_warn_large_inputs or test_directory_workflow)'
# any of these tests will trigger the error, I'm just being comprehensive

Expected Behavior

Tests pass without failure

Actual Behavior

ERROR    cwltool:test_ext.py:30 Got workflow error
Traceback (most recent call last):
  File "cwltool/executors.py", line 220, in run_jobs
    for job in jobiter:
  File "cwltool/command_line_tool.py", line 963, in job
    builder = self._init_job(job_order, runtimeContext)
  File "cwltool/process.py", line 788, in _init_job
    visit_class(v, ("Directory",), lambda x: inc(dircount))  # noqa: B023
  File "cwltool/utils.py", line 219, in visit_class
    op(rec)
  File "cwltool/process.py", line 788, in <lambda>
    visit_class(v, ("Directory",), lambda x: inc(dircount))  # noqa: B023
AttributeError: attribute 'inc' of '_init_job_Process_env' undefined
ERROR    cwltool:test_ext.py:30 Workflow error, try again with --debug for more information:
attribute 'inc' of '_init_job_Process_env' undefined

Your Environment

• Mypy version used: 1.7.0
• Mypy command-line flags:
• Mypy configuration options from mypy.ini (and other config files):
• Python version used: 3.11.2, but also 3.8, 3.9, 3.11, and 3.12

[AlexWaygood]

Bisected to e1f6d6b from #16268

cc. @JukkaL

[ilevkivskyi]

A standalone mypyc test case to reproduce

[case testCallNestedFunctionWithLambda]
def f(x: int) -> int:
    def inc(x: int) -> int:
        return x + 1
    return (lambda x: inc(x))(1)
[file driver.py]
from native import f
print(f(1))
[out]
2

Fails with

Traceback (most recent call last):
  File "driver.py", line 2, in <module>
    print(f(1))
          ^^^^
  File "run-functions.test", line 1294, in f
    return (lambda x: inc(x))(1)
  File "run-functions.test", line 1294, in <lambda>
    return (lambda x: inc(x))(1)
AttributeError: attribute 'inc' of 'f_env' undefined

[ilevkivskyi]

Also same crash in a test that doesn't involve a lambda:

[case testCallNestedFunctionWithoutLambda]
def f() -> None:
    def a() -> None:
        pass
    def b() -> None:
        a()
    b()
[file driver.py]
from native import f
f()