2013/3/14 Igor Stasenko <siguctua at gmail.com>:
> as a follow-up.. given the implementation of at:put:
> i expected that following would work correctly:
>
> | x y |
> B methodDict removeKey: #foo ifAbsent: [ ].
> x := B new bar.
> B methodDict at: #foo put: (B>>#zork).
> B methodDict at: #foo put: (B>>#zork).
> y := B new bar.
> {  x. y }
>
> (a second at:put: shall trigger flushing the cache)..
>
> yet it gives same answer:
>  #('foo' 'foo')
>
> Conclusion: primitive 116 is NOT enough.
>
> While method's comment says otherwise:
>
> flushCache
>         "Tell the interpreter to remove all references to this method from
> its method lookup cache, if it has one. This primitive must be called
> whenever a method is redefined or removed.
>         NOTE:  Only one of two selective flush methods (Symbol or
> CompiledMethod) needs to be used."
>
>         <primitive: 116>
>
> --
> Best regards,
> Igor Stasenko.
>

Yes the comment is for old VM and obsolete.
But see Behavior>>basicAddSelector:withMethod: and basicRemoveMethod,
they invoke primitive 119 unconditionnally.

Misunderstanding in this area is dangerous, so it's time to properly
document and clean if necessary, and kill false assumptions.

Nicolas