LSP: No-op client/registerCapability requests #6258
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the-mikedavis
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archseer
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Mar 11, 2023
Some language servers send this request even though we don't enable dynamic capability registration. In some language servers that use the vscode-languageserver-node dependency, replying with an error can cause the server to exit because an un-caught rejected promise is fatal. Replying with a JSONRPC error that the method is not handled is the correct thing to do but given that it causes some language servers in the wild to exit and that ignoring it doesn't cause any harm, we can workaround the exits by just sending an OK and doing nothing. This is similar to a workaround done by neovim.
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Some language servers send this request even though we don't enable dynamic capability registration. In some language servers that use the vscode-languageserver-node dependency, replying with an error can cause the server to exit because an un-caught rejected promise is fatal.
Replying with a JSONRPC error that the method is not handled is the correct thing to do but given that it causes some language servers in the wild to exit and that ignoring it doesn't cause any harm, we can workaround the exits by just sending an OK and doing nothing. This is similar to a workaround done by neovim.
Recent examples: #6230, #6243