Stack overflow when deserializing unexpected JSON values

[Muximize]

When deserializing "malformed", non-round-trip JSON where unexpected values are encountered, a stack overflow occurs.

For example, when deserializing the following JSON to an object where both properties are Power

{
 "ChargePower": {
 "Unit": "PowerUnit.Kilowatt",
 "Value": 11.0
 },
 "DischargePower": 12.0
}

then the latter triggers an infinite loop in this code:

UnitsNet/UnitsNet.Serialization.JsonNet/UnitsNetIQuantityJsonConverter.cs

Lines 66 to 69 in 47cdd1f

	if (valueUnit == null)
	{
	return token.ToObject<IQuantity>(serializer);
	}

I guess there could be a nicer way of handling this. Maybe interpreting the value as the base unit of Power or throwing an exception?

Also, thanks for making this great library! 👍

[lipchev]

Yes, indeed - using a default value for missing properties is the way we went in #985 and #990 (WIP - I'll try to get it out for the start of the new year).
Not sure how to deal with the existing converter- I guess an exception should be thrown somewhere along the way..

[stale]

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