Error CS8374 Cannot ref-assign 'val' to 'reference' because 'val' has a narrower escape scope than 'reference'

[greenozon]

Input code

Can't compile decompiled code

Erroneous output

		public static int CountDifferences<T>(T[] enumerable1, T[] enumerable2)
		{
			if (enumerable1 == null)
			{
				throw new ArgumentNullException("enumerable1");
			}
			if (enumerable2 == null)
			{
				throw new ArgumentNullException("enumerable2");
			}
			if (enumerable1.Length != enumerable2.Length)
			{
				throw new ArgumentException("Sizes of arrays are different");
			}
			int num = 0;
			for (int i = 0; i < enumerable1.Length; i++)
			{
				ref readonly T reference = ref enumerable1[i];
				T val = default(T);
				if (val == null)
				{
					val = reference;
					reference = ref val;
				}
				if (!reference.Equals(enumerable2[i]))
				{
					num++;
				}
			}
			return num;
		}

Details

• ILSpy version 9.0.0.7915+53522c45f887c4dc8f490815f40a724e4e9e1559
  .NET version 8.0.11+9cb3b725e3ad2b57ddc9fb2dd48d2d170563a8f5

[greenozon]

as a quick fix I made this (is it OK?)

if (!enumerable1[i].Equals(enumerable2[i]))
				{
					num++;
				}