Memory ownership destroyed for unknown reason

[Scooletz]

TransformExtension methods for some reason destroys the memory ownership and requires copying to a locally stackallocked Span. This should not be the biggest burden, but still, solving the mystery would be appreciated. The method that misbihaves is this one

Paprika/src/Paprika/Merkle/ComputeMerkleBehavior.cs

Lines 363 to 389 in 43492be

	private static DeleteStatus TransformExtension(in Key childKey, ICommit commit, in Key key, in Node.Extension ext)
	{
	using var childOwner = commit.Get(childKey);
	// TODO: this should be not needed but for some reason the ownership of the owner breaks memory safety here
	Span<byte> copy = stackalloc byte[childOwner.Span.Length];
	childOwner.Span.CopyTo(copy);
	Node.ReadFrom(copy, out var childType, out var childLeaf, out var childExt, out _);
	if (childType == Node.Type.Extension)
	{
	// it's E->E, merge extensions into a single extension with concatenated path
	commit.DeleteKey(childKey);
	commit.SetExtension(key,
	ext.Path.Append(childExt.Path, stackalloc byte[NibblePath.FullKeccakByteLength]));
	return DeleteStatus.NodeTypePreserved;
	}
	// it's E->L, merge them into a leaf
	commit.DeleteKey(childKey);
	commit.SetLeaf(key,
	ext.Path.Append(childLeaf.Path, stackalloc byte[NibblePath.FullKeccakByteLength]));
	return DeleteStatus.ExtensionToLeaf;
	}

Depending on the run it can throw:

1. NullReferenceException
2. Break CLR by pointing to some valid memory region but failing of dispose dispatch

[AbhinavMir]

Should I quickly run this thru a debugger of some sort and see what's happening? I can then make a guess if I'm the right person to solve it or not. Need a day or two to set things up! Cheers