Diagnostic-languageserver stopped working in Deno >= 1.43

[akhilman]

Diagnostic-languageserver stopped working in Deno >= 1.43.
No errors, just shuts down gracefully after a second and first linter's warning shown in the editor. Everything works fine with Deno 1.42.2 and older.

I have no idea how to debug this issue. Also, diagnostic-languageserver is a tiny application written on top of Microsoft's huge vscode-languageserver library, and I believe misbehaving code is somewhere in that library.

Right now I plan to bisect the exact Deno commit where this issue starts and then open an issue.

Tested with:

• Up to date Debian Bookworm and Arch;
• Deno from Arch repo and official builds from github;
• Helix 24.3 as LSP client;
• Diagnostic-languageserver 1.15.0 installed with deno install;

My Helix configuration can be found here https://github.com/akhilman/config-helix/blob/master/languages.toml

Any advice is welcome.

[akhilman]

Issue with the result of bisect #23889

[akhilman]

Will be fixed by #23473