Trying to debug ccls-mode over tramp

• emacs-ccls

  3 197 4.0 Emacs Lisp

  Emacs client for ccls, a C/C++ language server

  

I've broken into emacs backtrace with kill -USR2 and I've dumped the lsp io log, and what I can tell is that there's no communication between ccls and emacs when the hang happens. This isn't a case of ccls flooding emacs. The backtrace shows that its hanging on this line of ccls-mode: https://github.com/MaskRay/emacs-ccls/blob/master/ccls-semantic-highlight.el#L304 Specifically its hanging inside that call to find-buffer-visiting in some tramp internals. What I'm wondering is, is ccls-mode misusing this call? Or is something broken in tramp?

• ccls

  41 3,639 5.3 C++

  C/C++/ObjC language server supporting cross references, hierarchies, completion and semantic highlighting

I'm actually surprised this worked for you. I assumed I was getting the same issue as this: https://github.com/MaskRay/ccls/issues/411 And I found other references to the same thing elsewhere. I'm pretty sure this isn't scanning files on the remote. I'm watching the tramp log and there are no new opens happening.

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• lsp-mode

  118 4,669 9.3 Emacs Lisp

  Emacs client/library for the Language Server Protocol

  

If you believe it is rather a Tramp issue, report it on the [[email protected]](mailto:[email protected]) mailing list. Some weeks ago, I've helped the lsp-mode people on another problem with Tramp, so maybe we can nail it down for you as well. See https://github.com/emacs-lsp/lsp-mode/issues/2375 Please note that I don't use lsp-mode or ccls-mode; a step-by-step recipe for reproducing the problem would help.

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