Calculation rule "default on error" doesn't work for list-valued properties

[mattheyan]

If a calculation throws an error, the defaultIfError option is used as the property value instead, which has a default value of null. This isn't a valid value for list-valued properties, and it results in an error: "Cannot read property 'length' of null".

Should we...

• Use the property default instead?
• Use a data-type default?
• Use [] for list-valued properties, and null for others?

On a related note, it might be good for canSetValue to return false if you try to set a list-valued property to null (since that will also result in cryptic unhandled errors for the same reason).