bug#71774: 31.0.50; Hash table weakness broken?

[martin rudalics]

>> Which "values" would you set to nil?
>
> The global variable "values", which the REPL uses to store evaluated values.
>
>> What precisely did you do?
>
> Here's my *scratch* buffer in emacs -Q:
>
>
> (defvar table (make-hash-table :weakness t))
>
> (puthash t (split-window) table)
>
> (delete-other-windows)
>
> (garbage-collect)
>
> (gethash t table)
>
> (setq values nil)
>
> (garbage-collect)
>
> (gethash t table)
>
>
> What I did is go through this buffer line by line, using C-x C-e after each 
line. The first gethash produces the window, the second returns nil.

You're right.  So here the scenario

(defvar table (make-hash-table :weakness t))

(progn
  (puthash t (split-window) table)
  (delete-other-windows))

(garbage-collect)

(gethash t table)

gets me nil too.  So to make such tests work one has to tinker with
that obsolete variable 'values'.  Worrisome.

Closing this bug and many thanks, martin