diff --git a/BeefLibs/corlib/src/Array.bf b/BeefLibs/corlib/src/Array.bf
index a6dc0e86..b4846ec3 100644
--- a/BeefLibs/corlib/src/Array.bf
+++ b/BeefLibs/corlib/src/Array.bf
@@ -270,16 +270,18 @@ namespace System
 
 		public void CopyTo(Span<T> destination)
 		{
-			Debug.Assert(destination.Length >= mLength);
+			Debug.Assert(destination.[Friend]mPtr != null);
+			Debug.Assert(destination.[Friend]mLength >= mLength);
+
 			Internal.MemCpy(destination.Ptr, &GetRef(0), strideof(T) * mLength, alignof(T));
 		}
 
 		public void CopyTo(Span<T> destination, int srcOffset)
 		{
-			Debug.Assert(destination.Length >= mLength);
-			Debug.Assert((uint)srcOffset <= (uint)mLength);
+			Debug.Assert(destination.[Friend]mPtr != null);
+			Debug.Assert((uint)destination.[Friend]mLength - (uint)srcOffset < (uint)mLength);
 
-			Internal.MemCpy(destination.Ptr, &GetRef(srcOffset), strideof(T) * (mLength - srcOffset), alignof(T));
+			Internal.MemCpy(destination.Ptr, &GetRef(srcOffset), strideof(T) * (destination.Length - srcOffset), alignof(T));
 		}
 
 		public Span<T>.Enumerator GetEnumerator()