rescriptls quit with exit code 1 and signal 0

[Zeta611]

I can't get rescript-language-server working in my NeoVim w/

return {
	{ "rescript-lang/vim-rescript", ft = "rescript" },
	{
		"neovim/nvim-lspconfig",
		opts = {
			servers = {
				rescriptls = {
					mason = false,
				},
			},
		},
	},
}

where I manually installed rescript-language-server 1.62.0 on my Nix-managed NeoVim.

Here is a log:

Log

[ERROR][2025-07-03 23:53:46] ...p/_transport.lua:36"rpc" "rescript-language-server" "stderr" "/nix/store/smsf3d20n08h6h03b8hix19i6273nc14-rescript-language-server-1.62.0/lib/node_modules/@rescript/language-server/out/cli.js:42\n${h});let v={type:yh.MessageType.Warning,message:[Incremental typechecking] Something might have gone wrong with incremental type checking. Check out the error log and report this issue please.};n({jsonrpc:Z,method:\"window/showMessage\",params:v})}catch(j){console.error(j)}let M={jsonrpc:Z,method:\"textDocument/publishDiagnostics\",params:{uri:(0,Ac.pathToFileURL)(t.file.sourceFilePath),diagnostics:N}};n(M)}r?.()});t.killCompilationListeners.push(()=>{a.kill(\"SIGKILL\")})}catch(a){console.error(a)}}function Dh(t,e,n,r){ht()&&console.log(\"Updated: \"+t),Yv(t,e,n,r)}function Ph(t){ht()&&console.log(\"Closed: \"+t);let e=jn.get(t);e!=null&&(wh(t,e.project.rootPath),jn.delete(t),Nc.delete(e.file.originalTypeFileLocation),bh.unwatch([e.file.originalTypeFileLocation]))}function Eh(t){let e=jn.get(t);return e!=null?e.codeActions:null}var Lc={},Oc=null,jc=!1,Hc=0,Ic=!1,Zr=new Map,Ah={},ne=t=>{},qh=t=>le.extensionConfiguration.binaryPath==null?_n(t,pe.join(Zn,Jn)):so(le.extensionConfiguration.binaryPath,Jn),Zv=new ti.RequestType(\"textDocument/createInterface\"),ew=new ti.RequestType(\"textDocument/openCompiled\"),tw=t=>{let e=null;return Ve.forEach((n,r)=>{e==null&&n.filesDiagnostics[t]!=null&&(e=n.filesDiagnostics[t].slice())}),e??[]},nw=()=>{Ve.forEach((t,e)=>{let{filesWithDiagnostics:n}=t,r=pe.join(e,Ji),i=$e.default.readFileSync(r,{encoding:\"utf-8\"}),{done:o,result:s,codeActions:a,linesWithParseErrors:u}=ao(i);if(u.length>0){let p={type:B.MessageType.Warning,message:There are more compiler warning/errors that we could not parse. 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Did you install it? 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e=t.params,n=(0,Se.fileURLToPath)(e.textDocument.uri),r=Ln(e.textDocument.uri),i=pe.extname(e.textDocument.uri),o=on(i),s=[],a=Ah[e.textDocument.uri]??[],u=Eh(n)??[];[...a,...u].forEach(({range:A,codeAction:q})=>{fd(A,e.range)&&s.push(q)}),$e.default.writeFileSync(o,r,{encoding:\"utf-8\"});let p=Ct(n,[\"codeAction\",n,e.range.start.line,e.range.start.character,e.range.end.line,e.range.end.character,o],t);$e.default.unlink(o,()=>null);let{result:h}=p,y=h!=null&&Array.isArray(h)?[...s,...h]:s;return{jsonrpc:Z,id:t.id,result:y.length>0?y:null}}function Dw(t){let e={jsonrpc:Z,id:t.id,result:[]},n=t.params,r=(0,Se.fileURLToPath)(n.textDocument.uri),i=pe.extname(n.textDocument.uri);if(i!==Bt&&i!==Lr){let o={type:B.MessageType.Error,message:Not a ${Bt} or ${Lr} file. 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Something broke. Here's the error message that you can report if you want:\n \n\nTypeError: s is not iterable\n at Th (/nix/store/smsf3d20n08h6h03b8hix19i6273nc14-rescript-language-server-1.62.0/lib/node_modules/@rescript/language-server/out/cli.js:42:10233)\n at pi.kh [as callback] (/nix/store/smsf3d20n08h6h03b8hix19i6273nc14-rescript-language-server-1.62.0/lib/node_modules/@rescript/language-server/out/cli.js:42:12321)\n at /nix/store/smsf3d20n08h6h03b8hix19i6273nc14-rescript-language-server-1.62.0/lib/node_modules/@rescript/language-server/out/cli.js:3:19579\n at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n\nNode.js v22.16.0\n"