Cannot list files in a directory

[JamieMagee]

When trying to do a Directory.GetFiles call using Node.js as my runtime I get a System.EntryPointNotFoundException: SystemNative_OpenDir exception.

Reading a specific file works okay.

$ node --version
v18.6.0
$ dotnet --list-sdks
3.1.421 [C:\Program Files\dotnet\sdk]
6.0.100-rc.1.21463.6 [C:\Program Files\dotnet\sdk]
6.0.100 [C:\Program Files\dotnet\sdk]
6.0.107 [C:\Program Files\dotnet\sdk]
6.0.302 [C:\Program Files\dotnet\sdk]
7.0.100-preview.5.22307.18 [C:\Program Files\dotnet\sdk]

Program.cs

Console.WriteLine("Hello, World!");
var content = File.ReadAllText("/sandbox/sandbox.txt");
Console.WriteLine(content);
var files = Directory.GetFiles("/sandbox");
foreach (var file in files)
{
    Console.WriteLine(file);
}

index.mjs

import { readFile } from 'node:fs/promises';
import { WASI } from 'wasi';
import { argv, env } from 'node:process';

const wasi = new WASI({
    args: argv,
    env,
    preopens: {
        '/sandbox': process.cwd(),
    }
});

const importObject = { wasi_snapshot_preview1: wasi.wasiImport };

const wasm = await WebAssembly.compile(
    await readFile(new URL('./dotnet-wasm.wasm', import.meta.url))
);
const instance = await WebAssembly.instantiate(wasm, importObject);

wasi.start(instance);

Output

$ node --experimental-wasi-unstable-preview1 .\index.mjs
(node:43600) ExperimentalWarning: WASI is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
Hello, World!
Hello world

Unhandled Exception:
System.EntryPointNotFoundException: SystemNative_OpenDir
   at Interop.Sys.OpenDir(String path)
   at System.IO.Enumeration.FileSystemEnumerator`1[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].CreateDirectoryHandle(String path, Boolean ignoreNotFound)
   at System.IO.Enumeration.FileSystemEnumerator`1[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Init()
   at System.IO.Enumeration.FileSystemEnumerator`1[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]..ctor(String directory, Boolean isNormalized, EnumerationOptions options)
   at System.IO.Enumeration.FileSystemEnumerable`1.DelegateEnumerator[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]..ctor(FileSystemEnumerable`1 enumerable, Boolean isNormalized)
   at System.IO.Enumeration.FileSystemEnumerable`1[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]..ctor(String directory, FindTransform transform, EnumerationOptions options, Boolean isNormalized)
   at System.IO.Enumeration.FileSystemEnumerable`1[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]..ctor(String directory, FindTransform transform, EnumerationOptions options)
   at System.IO.Enumeration.FileSystemEnumerableFactory.UserFiles(String directory, String expression, EnumerationOptions options)
   at System.IO.Directory.InternalEnumeratePaths(String path, String searchPattern, SearchTarget searchTarget, EnumerationOptions options)
   at System.IO.Directory.GetFiles(String path, String searchPattern, EnumerationOptions enumerationOptions)
   at System.IO.Directory.GetFiles(String path)
   at Program.</p><main>$(String[] args)