SharpLab crash

Entering the following code into SharpLab, in Run mode on x64 Release, will cause the container to crash:

```
using System;
using System.IO;
using System.IO.Compression;

var output = new MemoryStream();
var compressor = new BrotliStream(output, CompressionLevel.SmallestSize);
compressor.Write([0,0,0,0]);
compressor.Flush();
foreach (var b in output.ToArray())
    Console.WriteLine(b);
```