MethodError: no method matching Union{Int64, String}(::String)

[pascal-mueller]

Hi,

trying to get this working this Coc neovim plugin. There were several issues regarding this problem but it never got solved.

Output channel: Julia Language Server Trace

ERROR:
[ Info: Indexing StaticLint...
MethodError: no method matching Union{Int64, String}(::String)
Stacktrace:

[1]
LanguageServer.InitializeParams
(
::
Dict{String,Any
}) at /home/user/.julia/packages/LanguageServer/y1ebo/src/protocol/initialize.jl:111
[2] dispatch_msg(::JSONRPC.JSONRPCEndpoint, ::JSONRPC.MsgDispatcher, ::Dict{String,Any}) at /home/user/.julia/packages/JSONRPC/1Kq3H/src/typed.jl:64
[3]
run(::LanguageServerInstance) at /home/user/.julia/packages/LanguageServer/y1ebo/src/languageserverinstance.jl:308
[4] top-level scope at none:1
[Info - 3:20:46 PM] Connection to server got closed. Server will restart.
[Error - 3:20:46 PM] /usr/bin/julia exited with code: 1

[martenlienen]

I have the same issue when I precompile LanguageServer with PackageCompiler. It works fine with the default sysimage.

[oblitum]

I'm also trying to use it from coc but have hit the same issue. What does a default sysimage mean?

This is my language server configuration that borrows from docs:

  if executable('julia')
    let languageservers['julia'] = {
    \   'command': 'julia',
    \   'args': ['--startup-file=no', '--history-file=no', '-e', '
    \     using LanguageServer;
    \     using Pkg;
    \     import StaticLint;
    \     import SymbolServer;
    \     env_path = dirname(Pkg.Types.Context().env.project_file);
    \     server = LanguageServer.LanguageServerInstance(stdin, stdout, env_path, "");
    \     server.runlinter = true;
    \     run(server);
    \   '],
    \   'filetypes': ['julia']
    \ }
  endif

Which means at first I'm not using coc-julia, just configuring the server directly. On julia REPL I Pkg.add LanguageServer, StaticLint and SymbolServer.

[martenlienen]

I had a custom sysimage compiled with PackageCompiler.jl, though since Julia 1.6 that is no longer necessary for good performance.

[oblitum]

I managed to fix this problem by picking LanguageServer from master:

julia> using Pkg
julia> Pkg.add(url="https://github.com/julia-vscode/LanguageServer.jl")
julia> Pkg.add("SymbolServer")
julia> Pkg.add("StaticLint")

[lassepe]

It seems that the root of this issue is that the tests fail on 3.2.0. If I run ]test LanguageServer in a clean environment with the lastest tagged version (LanaguageServer 3.2.0) then a lot of the tests error. coc-julia uses LanguageServer.jl:test/runtest.jl to generate precompile instructions.

[oblitum]

coc-julia is now fixed and avoids the problem.