Spyder won't launch with update to 5.4.2

[wforbes-pde]

Issue Report Checklist

• Searched the issues page for similar reports
• Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• Could not reproduce inside jupyter qtconsole (if console-related)
• Tried basic troubleshooting (if a bug/error)
  • Restarted Spyder
  • Reset preferences with spyder --reset
  • Reinstalled the latest version of Anaconda
  • Tried the other applicable steps from the Troubleshooting Guide
• Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

I updated to spyder 5.4.2. However, when I unsuccessfully open spyder from the terminal, I get this message.

What steps reproduce the problem?

1. conda install spyder=5.4.2

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

Paste Traceback/Error Below (if applicable)

(base) w@comp-pde:~$ conda install spyder=5.4.2
Collecting package metadata (current_repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /home/w/mambaforge3

  added / updated specs:
    - spyder=5.4.2


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    spyder-5.4.2               |   py39hf3d152e_0        10.5 MB  conda-forge
    ------------------------------------------------------------
                                           Total:        10.5 MB

The following packages will be UPDATED:

  spyder             pkgs/main::spyder-5.4.1-py39h06a4308_0 --> conda-forge::spyder-5.4.2-py39hf3d152e_0 


Proceed ([y]/n)? y


Downloading and Extracting Packages
                                                                                                                                                                                                                                                                                   
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
(base) w@comp-pde:~$ spyder
fromIccProfile: failed minimal tag size sanity
Traceback (most recent call last):
  File "/home/w/mambaforge3/bin/spyder", line 11, in <module>
    sys.exit(main())
  File "/home/w/mambaforge3/lib/python3.9/site-packages/spyder/app/start.py", line 253, in main
    mainwindow.main(options, args)
  File "/home/w/mambaforge3/lib/python3.9/site-packages/spyder/app/mainwindow.py", line 1822, in main
    mainwindow = create_window(MainWindow, app, splash, options, args)
  File "/home/w/mambaforge3/lib/python3.9/site-packages/spyder/app/utils.py", line 289, in create_window
    main.setup()
  File "/home/w/mambaforge3/lib/python3.9/site-packages/spyder/app/mainwindow.py", line 777, in setup
    ppm = self.get_plugin(Plugins.PythonpathManager)
  File "/home/w/mambaforge3/lib/python3.9/site-packages/spyder/app/mainwindow.py", line 355, in get_plugin
    raise SpyderAPIError(f'Plugin "{plugin_name}" not found!')
spyder.api.exceptions.SpyderAPIError: Plugin "pythonpath_manager" not found!

Versions

• Spyder version: 5.4.2
• Python version: 3.9.13
• Qt version:
• PyQt version: 5.15.7
• Operating System name/version: Ubuntu 22.10. 5.19.0-35-generic

Dependencies

PASTE DEPENDENCIES HERE

[dalthviz]

Hi @wforbes-pde , thank you for the feedback! Seems like you had Spyder 5.4.1 from the main/default channel, right? Could you try to uninstall and install Spyder 5.4.2 again? I think a similar traceback happened in the PR that introduced the pythonpath manager plugin mentioned in the traceback (#19937 (comment)) and basically reinstalling Spyder helped to enable the new plugin to register properly.

Let us now if reinstalling helps!

[wforbes-pde]

Actually, I was using (I think) 5.1/2 because I had issues before with upgrading to whatever the latest version was at the time. Yesterday, I decided to upgrade to 5.4.1. I got a different error and that didn't work. So, I thought that maybe updating to 5.4.2 might work.

The uninstall didn't work.

(base) w@comp-pde:~$ conda uninstall spyder
Collecting package metadata (repodata.json): done
Solving environment: | -
The environment is inconsistent, please check the package plan carefully
The following packages are causing the inconsistency:

• conda-forge/linux-64::mamba==0.19.0=py39hfa8f2c8_0
  / Segmentation fault (core dumped)

[dalthviz]

Maybe doing a rollback to your base env to the revision before you tried to update Spyder to 5.4.1 could help? For the rollback you can check https://conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#restoring-an-environment

[dalthviz]

Closing due to lack of response