Re: [Chicken-janitors] #1293: eq?-hash tables calculcate different value for objects after they're mutated and lose locatives after GC

[Chicken Trac]

#1293: eq?-hash tables calculcate different value for objects after they're
mutated and lose locatives after GC
-------------------------------------+-------------------------------------
            Reporter:  sjamaan       |      Owner:
                Type:  defect        |     Status:  new
            Priority:  critical      |  Milestone:  someday
           Component:  core          |    Version:  4.10.x
  libraries                          |   Keywords:  srfi-69, hash tables,
          Resolution:                |  locatives
Estimated difficulty:  hard          |
-------------------------------------+-------------------------------------
Changes (by johnwcowan):

 * difficulty:  insane => hard


Comment:

 The Right Thing here is to use a pointer as the eq-hash, and then modify
 the major GC (which has a conspectus of all of memory) so that it rehashes
 all the eq-hash-tables at once.  This is hard, but not insanely hard.

 Alternatively, simply declare that anyone who mutates a key deserves to
 lose, even in eq-hash-tables.

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Ticket URL: <https://bugs.call-cc.org/ticket/1293#comment:11>
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