CircuitPython's code.py ends up in Mu installation folder and crashes Mu

[carlosperate]

Because Python's standard library pdb module does import code:

❯ echo "this file in the Mu installation folder should not be imported" > code.py

❯ python run.py
Traceback (most recent call last):
  File "/Users/microbit-carlos/workspace/carlos/mu/run.py", line 2, in <module>
    from mu.app import run
  File "/Users/microbit-carlos/workspace/carlos/mu/mu/app.py", line 47, in <module>
    from .logic import Editor, LOG_FILE, LOG_DIR, ENCODING
  File "/Users/microbit-carlos/workspace/carlos/mu/mu/logic.py", line 36, in <module>
    from pyflakes.api import check
  File "/Users/microbit-carlos/workspace/carlos/mu/.venv-qt6/lib/python3.10/site-packages/pyflakes/api.py", line 10, in <module>
    from pyflakes import checker, __version__
  File "/Users/microbit-carlos/workspace/carlos/mu/.venv-qt6/lib/python3.10/site-packages/pyflakes/checker.py", line 11, in <module>
    import doctest
  File "/Users/microbit-carlos/.pyenv/versions/3.10.8/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/doctest.py", line 100, in <module>
    import pdb
  File "/Users/microbit-carlos/.pyenv/versions/3.10.8/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/pdb.py", line 77, in <module>
    import code
  File "/Users/microbit-carlos/workspace/carlos/mu/code.py", line 1
    this file in the Mu installation folder should not be imported
         ^^^^
SyntaxError: invalid syntax

The bug here is that somehow the CircuitPython mode must be saving the code.py file in the Mu's cwd instead of the CIRCUITPY drive.

Crash reports:

• Crash Report crash-reports#514
• Crash Report crash-reports#501
• Crash Report crash-reports#497
• The program crashes just after installation, it don't recognize the feather connected, though CIRCUITPY folder exists crash-reports#489
• Crash Report crash-reports#488
• Crash Report crash-reports#484
• Crash Report crash-reports#478
• Crash Report crash-reports#477
• Crash Report crash-reports#473
• Crash Report crash-reports#472
• Crash Report crash-reports#463
• Crash Report crash-reports#447
• Crash Report crash-reports#376
• Crash Report crash-reports#445
• Crash Report crash-reports#539
• Crash Report crash-reports#543
• Crash Report crash-reports#548
• Crash Report C:\Users\JohnB\AppData\Local\python\mu\Logs\mu.log crash-reports#552
• Crash Report crash-reports#580
• Crash Report crash-reports#586
• Crash Report crash-reports#584
• Crash Report crash-reports#578
• Crash Report crash-reports#598
• Crash Report crash-reports#608
• Crash Report crash-reports#609
• Crash Report - Cant Open Mu at All crash-reports#623

These other crash reports are from having the cope.py file in other directories, that are likely added to the path as well, like the "Desktop", "Downloads" or other folders:

• Crash Report crash-reports#506
• Crash Report crash-reports#461
• Crash Report crash-reports#454
• Crash Report crash-reports#434
• Crash Report crash-reports#402
• Crash Report crash-reports#396
• Crash Report crash-reports#375
• Crash Report crash-reports#361
• Crash Report crash-reports#585
• Crash Report crash-reports#576
• Crash Report crash-reports#572
• Crash Report crash-reports#606
• Crash Report crash-reports#617
• Crash Report crash-reports#618

[carlosperate]

It's very interesting that this has only happened with Mu v1.2.0, not a single crash report from earlier versions. So maybe something we accidentally introduced in the last release?

v1.1.1...v1.2.0