bug#33201: 26.1; Edebug doesn't work on closures with edebug-unwrap-results

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 1 Nov 2018 19:59:18 +0000
> Cc: darkfeline@felesatra.moe, gazally@runbox.com, 33201@debbugs.gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> It seems like in Emacs 26.1 edebug can't be reliably used with
> edebug-unwrap-results non-nil because there's always a chance it will
> encounter the symbol `closure', at which point it errors out.
> [`closure' is wierd, because it has a meaning, yet has none of a
> function, a value, a property list.]

I understand, but why does this make it a "major" problem?  The only
major problem in Edebug I could understand is if Edebug could not be
used at all in some popular situation.  FWIW, I never set
edebug-unwrap-results non-nil, and I'm a happy "Edebugger".

> > I can: it's quite complex, and even includes gratuitous refactoring of
> > 'cond' as 'pcase'.
> 
> OK.  How about me doing a simpler, but less lazy fix which would just
> add handling of `closure' into the existing cond form?

That's one thing; the other is why do we need to change edebug-unwrap1
as well?  AFAIU, that takes care of a separate issue, right?