Disabling linting has no effect

[renkun-ken]

In VS Code, disabling r.lsp.diagnostics seems to have no effect and the following error appears in the log:

[2021-11-21 13:07:48.202] internal error: Error: argument "params" is missing, with no default
Call: dispatch(self, params)
Stack trace:
1: dispatch(self, params)

[2021-11-21 13:07:48.203] received:  Content-Length: 185

[2021-11-21 13:07:48.216] received payload.

[2021-11-21 13:07:48.216] handling notification:  workspace/didChangeConfiguration

[2021-11-21 13:07:48.216] settings  {
  "enabled": true,
  "args": [],
  "debug": true,
  "diagnostics": false,
  "lang": "",
  "use_stdio": false
}

[renkun-ken]

The error in the log comes from an incorrect signature of the setTrace notification handler.

Disabling linting has no effect is caused by that the published diagnostics is not cleaned up when linting is disabled.

[renkun-ken]

When I fix the signature with protocol_set_trace(self, params), then the language server no longer receives workspace/didChangeConfiguration when I change vscode settings. I've got no clue why this happens.