AssertionError in make_module_translation_map

Crash Report

mypyc asserted on specific directory.

Traceback

mypyc subtasks --show-traceback
Traceback (most recent call last):
  File "/tmp/ttrt/build/setup.py", line 5, in <module>
    ext_modules=mypycify(['subtasks', '--show-traceback'], opt_level="3", debug_level="1"),
  File "mypyc/build.py", line 525, in mypycify
  File "mypyc/build.py", line 435, in mypyc_build
  File "mypyc/build.py", line 243, in generate_c
  File "mypyc/codegen/emitmodule.py", line 425, in compile_modules_to_c
  File "mypyc/codegen/emitmodule.py", line 292, in compile_ir_to_c
  File "mypyc/namegen.py", line 50, in __init__
  File "mypyc/namegen.py", line 106, in make_module_translation_map
AssertionError: ['subtasks', 'subtasks.subtasks']

To Reproduce

cd /tmp/
mkdir ttrt
mkdir subtasks
touch subtasks/subtasks.py
mypyc subtasks  # this works

touch subtasks/__init__.py
mypyc subtasks --show-traceback  # this fails

Your Environment

mypyc -V
mypy 1.9.0 (compiled: yes)

python -V
Python 3.9.18
python is in venv

Linux Mint 21.1 Vera

Reproduce the failure with the directory layout and commands in the issue, then inspect mypyc/namegen.py around make_module_translation_map and the callers in mypyc/codegen/emitmodule.py. Confirm the fix by rerunning mypyc subtasks --show-traceback with subtasks/init.py present and checking that the assertion no longer occurs.