Deserialization reuses default List instead of creating new one

[Slimior]

If a class i want to (de)serialize has an IEnumerable<T> property with default value set to some List, after deserialization, such property will have both items set by default and deserialized.

using a type TestClass:

class TestClass 
{
    IEnumerable<string> SomeSequence {get; set;} = new List<string>{"test"};
}

the following fails

[Test]
public void TestSerializeDeserialize()
{
	var serializer = new Serializer();
	var value = new TestClass();
	var serialized = serializer.Deserialize<TestClass>(serializer.Serialize(value));
	Assert.That(serialized, Is.EqualTo(value));
}

as serialized.SomeSequence is now equal to new List<string>{"test", "test"}.

However, if the default value is set to an array (new string[]) this does not occur.