Error, typically wrapped in a Failure, when inappropriately using an empty collection.
For example, the following stack implementation fails when trying to pop a value from an empty stack. Sink context causes the returned
Failure to throw.
my = Stack.new.push(42);say .pop; # OUTPUT: «42␤»try .pop;say $!.message; # OUTPUT: «Cannot pop from an empty Stack␤»
Verbal description of the inappropriate action.
Returns the type that was the target of the action.