fatbuildrweb crash due to unsupported derivative

[rezib]

A build on a particular derivative:

$ fatbuildrctl --uri https://build.rackslab.io/devs build -a slurm -d bookworm --derivative slurm23.02 --msg "Update to Slurm 23.02.5" --watch
ERROR ⸬ server error: Remote server internal error (500)

Triggered this crash in fatbuildrweb server logs:

Oct 02 09:33:09 build.dev.rackslab.io uwsgi[984]: [pid: 984|app: 0|req: 7/54] 0.0.0.0 () {36 vars in 742 bytes} [Mon Oct  2 09:33:08 2023] GET /devs/pipelines/formats.json?distribution=bookworm => generated 112 bytes in 1257 msecs (HTTP/1.0 200) 2 headers in 72 bytes (1 switches on core 0)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]: uWSGIWorker5Core0: [ERROR] Exception on /devs/pipelines/formats.json [GET]
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]: Traceback (most recent call last):
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/fatbuildr/protocols/dbus/client.py", line 58, in error_handler_wrapper
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     return method(*args, **kwargs)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:            ^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/fatbuildr/protocols/dbus/client.py", line 127, in pipelines_derivative_formats
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     return self.proxy.PipelinesDerivativeFormats(derivative)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/dasbus/client/handler.py", line 450, in _call_method
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     return self._get_method_reply(
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:            ^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/dasbus/client/handler.py", line 483, in _get_method_reply
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     return self._handle_method_error(error)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/dasbus/client/handler.py", line 509, in _handle_method_error
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     raise exception from None
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]: fatbuildr.protocols.dbus.FatbuildrDBusErrorPipeline: Derivative slurm23.02 is not supported
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]: During handling of the above exception, another exception occurred:
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]: Traceback (most recent call last):
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/flask/app.py", line 2525, in wsgi_app
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     response = self.full_dispatch_request()
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/flask/app.py", line 1822, in full_dispatch_request
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     rv = self.handle_user_exception(e)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/flask/app.py", line 1820, in full_dispatch_request
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     rv = self.dispatch_request()
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:          ^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/flask/app.py", line 1796, in dispatch_request
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/fatbuildr/protocols/http/server/views.py", line 147, in wrapped
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     return view(instance, *args, **kwargs)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/fatbuildr/protocols/http/server/views.py", line 219, in pipelines_formats
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     formats = connection.pipelines_derivative_formats(filter_derivative)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:   File "/usr/lib/python3/dist-packages/fatbuildr/protocols/dbus/client.py", line 64, in error_handler_wrapper
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]:     raise FatbuildrServerError(err)
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]: fatbuildr.errors.FatbuildrServerError: Derivative slurm23.02 is not supported
Oct 02 09:33:09 build.dev.rackslab.io uwsgi[986]: [pid: 986|app: 0|req: 25/55] 0.0.0.0 () {36 vars in 742 bytes} [Mon Oct  2 09:33:09 2023] GET /devs/pipelines/formats.json?derivative=slurm23.02 => generated 265 bytes in 66 msecs (HTTP/1.0 500) 2 headers in 99 bytes (1 switches on core 0)