hash tables & symbols

After making some changes to Lush's memory management in
my Lush fork the property mechanism (getp/putp) does not
work quite as before. I finally figured that it has to do
with the fact that unused symbols do not get reclaimed in
mainline Lush:

? (setq ht (htable 17 t))
= ::HTABLE:88d0db0
? (ht 'carell 'show)
= ::HTABLE:88d0db0
? (ht "uncle" "sam")
= ::HTABLE:88d0db0
? (ht 12 'o-clock)
= ::HTABLE:88d0db0
= t
? (htable-alist ht)
= ((carell . show))

Is this a bug or a feature?

Ralf


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