bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded

[Noam Postavsky]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> The problem is simply that `sxhash` doesn't use the same "rules" about
> which objects are compared by identity and which objects are compared
> by contents.

> The fix should be to make `sxhash` follow the same rules as `internal_equal`.
>
> This is a fairly long-standing problem, so unless it is newly triggered
> in "normal" circumstances in Emacs-27, the fix is probably best on
> `master`.

This was earlier reported as Bug#32503, by the way.