Bug or feature??

[Jonathan A Rees <JAR@MIT-MC.ARPA>]

    Date: Tue, 2 Oct 84 17:15:38 EDT
    From: Christopher Owens <Owens at YALE.ARPA>

    > (object-hash '(3 4 5))
    99
    > (object-unhash 99)
    (3 4 5)
    > (gc)

    ;Beginning garbage collection.
    ;(10000) Copying from 83D9AC to 5059CC.
    ;(20000) Copying from 868E94 to 530E94.
    ;(30000) Copying from 88B34D to 553365.

    ;Garbage collection finished.
    >   (object-unhash 99)
    (3 4 5)

    Why doesn't it go away?

The variable ** holds the value of the last form evaluated by the
read-eval-print loop.  When the GC procedure was called, ** had the list
(3 4 5) as its value.

Jonathan