PYDEVD kernel error when starting Spyder

Problem Description

Hi all, I receive this kernel error when Spyder starts up every time I start it. I have to restart the kernel a few times for it to begin working correctly.

What steps reproduce the problem?

1. Starting Spyder for the first time

What is the expected output? What do you see instead?

if I force restart the kernel a few times, the kernel will begin working every once in a while.

Paste Traceback/Error Below (if applicable)

0.01s ‑ Debugger warning: The os.path.realpath.__code__.co_filename (ntpath.py)
0.00s ‑ is not absolute, which may make the debugger miss breakpoints.
0.00s ‑ Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.

Versions

• Spyder version: 5.3.2
• Python version: 3.8.10
• Qt version: 5.15.2
• PyQt version: 5.15.7
• Operating System name/version: Win 11

Dependencies

# Mandatory:
atomicwrites >=1.2.0                 :  1.4.1 (OK)
chardet >=2.0.0                      :  5.0.0 (OK)
cloudpickle >=0.5.0                  :  2.1.0 (OK)
cookiecutter >=1.6.0                 :  2.1.1 (OK)
diff_match_patch >=20181111          :  20200713 (OK)
intervaltree                         :  None (OK)
IPython >=7.31.1;<8.0.0              :  7.34.0 (OK)
jedi >=0.17.2;<0.19.0                :  0.18.1 (OK)
jellyfish >=0.7                      :  0.9.0 (OK)
jsonschema >=3.2.0                   :  4.7.2 (OK)
keyring >=17.0.0                     :  23.6.0 (OK)
nbconvert >=4.0                      :  6.5.0 (OK)
numpydoc >=0.6.0                     :  1.4.0 (OK)
paramiko >=2.4.0                     :  2.11.0 (OK)
parso >=0.7.0;<0.9.0                 :  0.8.3 (OK)
pexpect >=4.4.0                      :  4.8.0 (OK)
pickleshare >=0.4                    :  0.7.5 (OK)
psutil >=5.3                         :  5.9.1 (OK)
pygments >=2.0                       :  2.12.0 (OK)
pylint >=2.5.0;<3.0                  :  2.14.4 (OK)
pyls_spyder >=0.4.0                  :  0.4.0 (OK)
pylsp >=1.5.0;<1.6.0                 :  1.5.0 (OK)
pylsp_black >=1.2.0                  :  1.2.1 (OK)
qdarkstyle >=3.0.2;<3.1.0            :  3.0.3 (OK)
qstylizer >=0.1.10                   :  0.2.1 (OK)
qtawesome >=1.0.2                    :  1.1.1 (OK)
qtconsole >=5.3.0;<5.4.0             :  5.3.1 (OK)
qtpy >=2.1.0                         :  2.1.0 (OK)
rtree >=0.9.7                        :  1.0.0 (OK)
setuptools >=49.6.0                  :  63.1.0 (OK)
sphinx >=0.6.6                       :  5.0.2 (OK)
spyder_kernels >=2.3.2;<2.4.0        :  2.3.2 (OK)
textdistance >=4.2.0                 :  4.3.0 (OK)
three_merge >=0.1.1                  :  0.1.1 (OK)
watchdog                             :  2.1.9 (OK)
zmq >=22.1.0                         :  23.2.0 (OK)

# Optional:
cython >=0.21                        :  0.29.30 (OK)
matplotlib >=3.0.0                   :  3.5.2 (OK)
numpy >=1.7                          :  1.22.4 (OK)
pandas >=1.1.1                       :  1.4.3 (OK)
scipy >=0.17.0                       :  1.8.1 (OK)
sympy >=0.7.3                        :  1.10.1 (OK)

# Spyder plugins:
spyder_terminal.terminalplugin 1.2.2 :  1.2.2 (OK)

[ccordoba12]

@dalthviz, a user that reported the same problem on issue #18977 confirmed that the fix you mentioned on https://github.com/spyder-ide/spyder/issues/18908#issuecomment-1205494761 solves the problem. So please go ahead and implement it.

[dalthviz]

🤔 right, checking I think if an error gets detected the shell is being shutdown. @Eilermoon could you add the Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation. as a new entry for the benign_errors list at https://github.com/spyder-ide/spyder/blob/1172bb4678970250c8e8f46a70a151c00d32d69f/spyder/plugins/ipythonconsole/widgets/client.py#L576-L592

With the default standalone installer installation dir the client.py file should be at C:\Users\<your user>\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\ipythonconsole\widgets\client.py if you did the installation for only the current user.

Let us know if the change there helps!