struct throws errors if it has a DTor

[bearophile]

Namespace:

>> (18-25):Error: function c739.Color.opAssign (Color p) is not 
>> callable using argument types (Color) const
...
> I have read the error messages, but they have made no sense to 
> me.

Since recently this error message was even worse, without the 
"const" at the end. I've asked for a further improvement of this 
error message.

Bye,
bearophile