[Chicken-janitors] #905: Unreliable behavior of hash tables with symbols as keys (regression wrt 4.7.4)

[Chicken Trac]

#905: Unreliable behavior of hash tables with symbols as keys (regression wrt
4.7.4)
----------------------------+-----------------------------------------------
 Reporter:  iraikov         |       Owner:       
     Type:  defect          |      Status:  new  
 Priority:  critical        |   Milestone:  4.8.0
Component:  core libraries  |     Version:  4.8.x
 Keywords:                  |  
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 The nemo program relies heavily on performing transformations over hash
 tables with symbols as keys. It works fine with Chicken 4.7.4, but
 unfortunately there seems to have been a regression in 4.8.0rc1, which
 results in hash-table-exists? and hash-table-ref failing to find any of
 the existing keys in the table after a number of transformations have been
 performed. I have not been able to create a small test case yet, but I
 suspect the hash tables stop working after some garbage collections have
 been performed. This issue is not entirely new; nemo previously used the
 environments egg, which was also exhibiting similar unreliable behavior,
 so I had resorted to using strings instead of symbols as keys. Any advice
 on how to debug this would be appreciated.

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Ticket URL: <http://bugs.call-cc.org/ticket/905>
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