Completion doesn't work if C source files contain some Unicode symbols.

[mukovnin]

Hi!

May be this issue related to ccls or #2080 bug.
I'm using latest lsp-mode, company and ccls packages from MELPA. Emacs 27.1.

Describe the bug
Completion doesn't work properly if C source files contain some Unicode symbols in comments.

To Reproduce
Create a file a.h:

/*
µ
*/
int Capability(int a, int *b);

and main.c:

#include "a.h"

int main()
{
}

Type "capa" in main(). Lsp-mode reports:

Warning (lsp-mode): Failed to parse the following chunk:
’’’
Content-Length: 355

{"jsonrpc":"2.0","id":16,"result":{"isIncomplete":false,"items":[{"label":"Capability(int a, int *b) -> int","kind":3,"detail":"","documentation":"�","sortText":"   !","filterText":"Capability","insertTextFormat":2,"textEdit":{"range":{"start":{"line":4,"character":4},"end":{"line":4,"character":7}},"newText":"Capability(${1:int a}, ${2:int *b})$0"}}]}}
’’’
with message (json-parse-error unable to decode byte 0xb5 near '"' <string> 1 147 147)

Which Language Server did you use
ccls

OS
Arch Linux

Error callstack
This.

[yyoncho]

I think it is most likely #1246

[yyoncho]

I tested that same setup with clangd-11 and it seems to work. Can you verify?

[mukovnin]

@yyoncho Checked with clangd 10, it works, thank you. It looks like this issue is related to ccls.

[yyoncho]

Thank you, I will close the issue and mark it as upstream.