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System.Numerics.Tensors constructor safety #106534

@soerenwolfers

Description

@soerenwolfers

Description

The innocuous looking

var a = new TensorSpan<double>(array: new[] {1});

performs an unsafe cast, such that

a[0] == double.Epsilon

for me and even that is only true because the surrounding 4 bytes happen to be zeros.

Reproduction Steps

using System.Diagnostics.CodeAnalysis;
using System.Numerics.Tensors;

namespace ConsoleApp1;

public abstract class Program
{
	[Experimental("SYSLIB5001")]
	public static void Main()
	{
		var a = new TensorSpan<double>(array: new[] {1});
		Console.WriteLine(a[new IntPtr[] { 0 }]);
	}
}

Expected behavior

There should be no public TensorSpan<T>(Array array) constructor.

Actual behavior

.

Regression?

No response

Known Workarounds

No response

Configuration

.Net8, Ubuntu22, x64

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No response

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area-System.Numerics.Tensorsin-prThere is an active PR which will close this issue when it is merged

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