Re: #768: s11n: reconstruction of hash-tables incorrect on de-serialization

[Chicken Trac]

#768: s11n: reconstruction of hash-tables incorrect on de-serialization
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            Reporter:  felix winkelmann  |      Owner:  (none)
                Type:  defect            |     Status:  new
            Priority:  critical          |  Milestone:
           Component:  extensions        |    Version:  4.7.x
          Resolution:                    |   Keywords:  s11n
Estimated difficulty:  hard              |
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Comment (by Idiomdrottning):

 About backwards compatibility: deserialize and chicken-dump in my version
 now expect eleven slots whereas they used to expect five. "So why not
 change the tag to `new-hash-table-tag` or similar?"

 The problem is that serialize itself was (and still is) implemented as
 "emit **all the slots** of hash-table", not just the first five. So for
 many many years, serialize has emitted eleven-slot hash-tables already
 while deserialize/chicken-dump has tried to snarf only five. Backwards
 compatibility was *already* broken.

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Ticket URL: <https://bugs.call-cc.org/ticket/768#comment:9>
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