LS cannot find packages when using Docker

Upon opening an Elm file with v2 of the language server I get:

The Elm server crashed 5 times in the last 3 minutes. The server will not be restarted.

The last part of the output is

TypeError: Cannot read property 'synchronize' of undefined
/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/server/node_modules/web-tree-sitter/tree-sitter.js:1
var Module=void 0!==Module?Module:{};!function(e,t){"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?module.exports=t():window.TreeSitter=t()}(0,function(){var e,t={};for(e in Module)Module.hasOwnProperty(e)&&(t[e]=Module[e]);var r,n,s=[],o=function(e,t){throw t},_=!1,a=!1;_="object"==typeof window,a="function"==typeof importScripts,r="object"==typeof process&&"object"==typeof process.versions&&"string"==typeof process.versions.node,n=!_&&!r&&!a;var i,u,l,d,c="";r?(c=a?require("path").dirname(c)+"/":__dirname+"/",i=function(e,t){return l||(l=require("fs")),d||(d=require("path")),e=d.normalize(e),l.readFileSync(e,t?null:"utf8")},u=function(e){var t=i(e,!0);return t.buffer||(t=new Uint8Array(t)),L(t.buffer),t},process.argv.length>1&&process.argv[1].replace(/\\/g,"/"),s=process.argv.slice(2),"undefined"!=typeof module&&(module.exports=Module),process.on("uncaughtExce

RuntimeError: abort(TypeError: Cannot read property 'synchronize' of undefined). Build with -s ASSERTIONS=1 for more info.
    at process.fe (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/server/node_modules/web-tree-sitter/tree-sitter.js:1:10450)
    at process.emit (events.js:228:7)
    at processPromiseRejections (internal/process/promises.js:201:33)
    at processTicksAndRejections (internal/process/task_queues.js:95:32)
[Error - 11:59:53 am] Connection to server got closed. Server will not be restarted.
[Error - 11:59:53 am] Request textDocument/documentSymbol failed.
Error: Connection got disposed.
	at Object.dispose (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/connection.js:1044:27)
	at Object.dispose (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/common/client.js:73:35)
	at LanguageClient.handleConnectionClosed (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/common/client.js:2424:42)
	at LanguageClient.handleConnectionClosed (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/node/main.js:155:15)
	at closeHandler (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/common/client.js:2411:18)
	at CallbackList.invoke (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:55:39)
	at Emitter.fire (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:117:36)
	at closeHandler (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/connection.js:256:26)
	at CallbackList.invoke (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:55:39)
	at Emitter.fire (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:117:36)
	at IPCMessageReader.fireClose (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/messageReader.js:40:27)
	at ChildProcess.<anonymous> (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/node/main.js:33:45)
	at ChildProcess.emit (events.js:228:7)
	at maybeClose (internal/child_process.js:1021:16)
	at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)
[Error - 11:59:53 am] Request textDocument/codeAction failed.
Error: Connection got disposed.
	at Object.dispose (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/connection.js:1044:27)
	at Object.dispose (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/common/client.js:73:35)
	at LanguageClient.handleConnectionClosed (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/common/client.js:2424:42)
	at LanguageClient.handleConnectionClosed (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/node/main.js:155:15)
	at closeHandler (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-languageclient/lib/common/client.js:2411:18)
	at CallbackList.invoke (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:55:39)
	at Emitter.fire (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:117:36)
	at closeHandler (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/connection.js:256:26)
	at CallbackList.invoke (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:55:39)
	at Emitter.fire (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/events.js:117:36)
	at IPCMessageReader.fireClose (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/common/messageReader.js:40:27)
	at ChildProcess.<anonymous> (/home/sebastian/.vscode/extensions/elmtooling.elm-ls-vscode-2.0.0/client/node_modules/vscode-jsonrpc/lib/node/main.js:33:45)
	at ChildProcess.emit (events.js:228:7)
	at maybeClose (internal/child_process.js:1021:16)
	at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)

The whole output is here https://gist.github.com/sporto/9a35f5caa1184807ea9d12412fcadac7

Current Behavior

Language server crashes

Steps to Reproduce (for bugs)

1. Install language server v2
2. Open an Elm file

Your Environment

• VScode 1.52.1
• Node 14.15.1
• Linux pop-os 20.10

[sporto]

With docker compose doing this fixes the issue:

client:
    ...
    volumes:
      ...
      - ~/.elm:/root/.elm

Then Elm will put packages on the host and the language server works.

I’m not sure if the LS can do anything about this. Maybe just document this issue.

[razzeee]

I’m going to close this then. Feel free to ping, if this should be opened up again.