perform:withArguments probably shouldn't work with the wrong number of arguments

[ltratt]

This program:

perform_witharguments_wrong = (
    run = (
        self perform: #f:b:c: withArguments: #(5 6).
    )

    f: a b: b c: c = (
        a println.
        b println.
        c println.
    )
)

prints:

instance of perform_witharguments_wrong
5
6

on Java SOM. This program:

perform_witharguments_wrong = (
    run = (
        self perform: #f:b:c: withArguments: #(5).
    )

    f: a b: b c: c = (
        a println.
        b println.
        c println.
    )
)

leads to:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 8
	at som.interpreter.Frame.getStackElement(Frame.java:165)
	at som.interpreter.Frame.copyArgumentsFrom(Frame.java:216)
	at som.vmobjects.SMethod.invoke(SMethod.java:124)
	at som.primitives.ObjectPrimitives$6.invoke(ObjectPrimitives.java:130)
	at som.interpreter.Interpreter.send(Interpreter.java:386)
	at som.interpreter.Interpreter.doSend(Interpreter.java:216)
	at som.interpreter.Interpreter.start(Interpreter.java:302)
	at som.vm.Universe.interpretMethod(Universe.java:332)
	at som.vm.Universe.initialize(Universe.java:303)
	at som.vm.Universe.interpret(Universe.java:78)
	at som.vm.Universe.main(Universe.java:64)

I suspect it would be good to require that perform:withArguments checks this and throws an error if the number of arguments doesn't match.

[smarr]

Yes, indeed.