LSP Lua suddenly stopped working: "***buffer overflow detected ***: terminated"

[barryblando]

How are you using the lua-language-server?

NeoVim

Which OS are you using?

Windows WSL

What is the issue affecting?

Diagnostics/Syntax Checking

Expected Behaviour

loading LSP completed

Actual Behaviour

suddenly stops working with the error "Client # quit with exit code 0 and signal 6"

Reproduction steps

1. open neovim
2. LSP loading...
3. suddenly stops working

Additional Notes

Using

• Neovim 0.8.2
• Mason
• Lua-Language-Server@3.6.7

Log File

[ERROR][2023-01-22 09:49:10] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[ERROR][2023-01-22 09:49:51] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[ERROR][2023-01-22 09:50:50] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[ERROR][2023-01-22 10:00:14] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[ERROR][2023-01-22 10:00:58] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[START][2023-01-22 10:02:31] LSP logging initiated
[ERROR][2023-01-22 10:02:31] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[ERROR][2023-01-22 10:02:49] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[START][2023-01-22 10:12:27] LSP logging initiated
[ERROR][2023-01-22 10:12:27] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[START][2023-01-22 10:14:02] LSP logging initiated
[ERROR][2023-01-22 10:14:02] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[ERROR][2023-01-22 10:17:28] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"
[ERROR][2023-01-22 10:17:47] .../vim/lsp/rpc.lua:733	"rpc"	"/home/bblando0x15/.local/share/nvim/mason/bin/lua-language-server"	"stderr"	"*** buffer overflow detected ***: terminated\n"

[caarlos0]

for me it fails on linux amd64, same config and same project works on macos arm64 though.

[JuanZoran]

I meet the same problem as you, did you have found any solution for that?

[JuanZoran]

I try to reboot my system, then it works well

[barryblando]

I meet the same problem as you, did you have found any solution for that?

none at the moment. also rebooted the WSL. Same buffer overflow. Other LSPs are working

I also change the sumneko_lua config to use vscode's Lua server. Still buffer overflow.

return {
  -- cmd = { os.getenv("HOME") .. "/.local/share/nvim/mason/bin/lua-language-server" },
  cmd = { os.getenv("HOME") .. "/.vscode-server/extensions/sumneko.lua-3.6.7-linux-x64/server/bin/lua-language-server" },
  on_new_config = function(config, root)
    local libs = vim.tbl_deep_extend("force", {}, library)
    libs[root] = nil
    config.settings.Lua.workspace.library = libs
    return config
  end,
  settings = {
    Lua = {
      runtime = {
        version = "LuaJIT",
        path = path
      },
      completion = { callSnippet = "Both" },
      diagnostics = {
        globals = { "vim" }
      },
      workspace = {
        library = library,
        maxPreload = 2000,
        preloadFileSize = 50000,
        checkThirdParty = false,
      },
      telemetry = { enable = false }
    }
  }
}

[Mikilio]

Same issue here I tried to check if my tweaks in the recent days broke my config but that wasn't the case.
Considering that I use Nix which is hundred percent reproducible I can only imagine that something about the protocol changed.

Edit: I was using the unstable channel. Using an older version fixed the issue for me. Thanks to @deriamis for pointing that out.

[deriamis]

I am having the same problem, and it appears to be something introduced between versions 3.6.4 and 3.6.5. I can run version 3.6.4 without any problems at all.

[sumneko]

Should be something with #1835
Could you please help us @koppchen ?

[kyoh86]

I am having the same problem, and it appears to be something introduced between versions 3.6.4 and 3.6.5. I can run version 3.6.4 without any problems at all.

Me too. It sounds me that something in 3.6.5 becauses the issue.

[koppchen]

I was able to reproduce this, and yeah it looks like the issue was introduced in v3.6.5

Tested with: neovim 0.8.2, with the linux-x64 releases from both lua-language-server and vscode-lua.

Tested the following versions:

• v3.6.7 - ERROR
• v3.6.6 - ERROR
• v3.6.5 - ERROR
• v3.6.4 - good
• v3.6.3 - good
• v3.6.2 - good

I did the following to reproduce the error. The lua files can be empty.

• Open a lua file in one terminal and keep it open
• Open a second lua file in another terminal.
• If the first completed loading the workspace, the second one will error. Otherwise, either (or both) could error.

Seems I usually only have one file open, which is why I didn't notice this sooner.

[koppchen]

Looks like the issue was introduced in this diff. I was testing a few older versions and this is where the failures started.

• 7075ca1 - update filewatch

Also, i should have mentioned this in my previous comment: The error I'm seeing in the logs is a little different then the original report, but it's probably related.

[ERROR][2023-01-31 10:25:37] .../vim/lsp/rpc.lua:733   "rpc"   "lua-language-server"   "stderr"   "*** bit out of range 0 - FD_SETSIZE on fd_set ***: terminated\n"

[sumneko]

How about v3.6.8?

[koppchen]

I got the same error with 3.6.8.

[ERROR][2023-01-31 13:41:08] .../vim/lsp/rpc.lua:733   "rpc"   "lua-language-server"   "stderr"   "*** bit out of range 0 - FD_SETSIZE on fd_set ***: terminated\n"