5.1.0 crashes with KeyError 'preferences'

Problem Description

Spyder won’t start due to a plugin KeyError. A spyder --reset doesn’t solve the problem.

What steps reproduce the problem?

Start spyder 5.1.0 or git 48b9305.

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

Spyder should start successfully. Instead, the following errors are shown.

Paste Traceback/Error Below (if applicable)

Traceback (most recent call last):
  File "/home/USER/repos/spyder/spyder/app/utils.py", line 271, in create_window
    main.setup()
  File "/home/USER/repos/spyder/spyder/app/mainwindow.py", line 892, in setup
    PLUGIN_REGISTRY.register_plugin(self, PluginClass,
  File "/home/USER/repos/spyder/spyder/api/plugin_registration/registry.py", line 274, in register_plugin
    instance = self._instantiate_spyder5_plugin(
  File "/home/USER/repos/spyder/spyder/api/plugin_registration/registry.py", line 164, in _instantiate_spyder5_plugin
    self._notify_plugin_dependencies(plugin_name)
  File "/home/USER/repos/spyder/spyder/api/plugin_registration/registry.py", line 224, in _notify_plugin_dependencies
    plugin_instance._on_plugin_available(plugin)
  File "/home/USER/repos/spyder/spyder/api/plugin_registration/mixins.py", line 59, in _on_plugin_available
    method()
  File "/home/USER/repos/spyder/spyder/plugins/layout/plugin.py", line 142, in on_toolbar_available
    before_action = self.get_action(
  File "/home/USER/repos/spyder/spyder/api/widgets/mixins.py", line 506, in get_action
    return ACTION_REGISTRY.get_reference(name, plugin, context)
  File "/home/USER/repos/spyder/spyder/utils/registries.py", line 133, in get_reference
    plugin_contexts = self.registry_map[plugin]
KeyError: 'preferences'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/USER/.local/bin/spyder", line 33, in <module>
    sys.exit(load_entry_point('spyder', 'gui_scripts', 'spyder')())
  File "/home/USER/repos/spyder/spyder/app/start.py", line 226, in main
    mainwindow.main(options, args)
  File "/home/USER/repos/spyder/spyder/app/mainwindow.py", line 2114, in main
    mainwindow = create_window(MainWindow, app, splash, options, args)
  File "/home/USER/repos/spyder/spyder/app/utils.py", line 273, in create_window
    if main.console is not None:
  File "/home/USER/repos/spyder/spyder/app/mainwindow.py", line 1109, in __getattr__
    return self.get_plugin(self._INTERNAL_PLUGINS_MAPPING[attr])
  File "/home/USER/repos/spyder/spyder/app/mainwindow.py", line 166, in get_plugin
    raise SpyderAPIError(f'Plugin "{plugin_name}" not found!')
spyder.api.exceptions.SpyderAPIError: Plugin "internal_console" not found!

Versions

• Spyder version: 5.1.0 and git 48b9305
• Python version: 3.8.10
• Qt version: 5.12.10
• PyQt version: 5.12.3
• Operating System name/version: Ubuntu 20.04

[ccordoba12]

Hey eveyone, thanks for reporting. I’m taking a look at this problem and will try to release 5.1.1 with a fix for it as soon as possible.

Thanks for your patience.

[ccordoba12]

Thanks for the confirmation @AndrewAmmerlaan!