While developing spectral, I discovered something peculiar.

Consider this sample pseudo C#/IL:

public static T Sqrt<T>(T value)
{
    ldarg.0
    conv.r8
    call double System.Math.Sqrt(double)
    ret
}

You'd expect some sort of error, right? The return type is T, but the returned value is a double.
Turns out it runs fine. What's more, you don't even need the conv.r8 instruction.

I have to say, IL's flexibility is amazing.

YellPika