From: Alan Mackenzie <acm@muc.de>
To: Dmitry Gutov <dmitry@gutov.dev>
Cc: Stefan Monnier <monnier@iro.umontreal.ca>, 67568@debbugs.gnu.org
Subject: bug#67568: Emacs master: Bug in byte compiler when there's an unused parameter.
Date: Fri, 1 Dec 2023 14:16:53 +0000 [thread overview]
Message-ID: <ZWnq1ccixoFFnYIl@ACM> (raw)
In-Reply-To: <1c2d9219-093c-0726-13ce-2c952f6e33ba@gutov.dev>
Hello, Dmitry.
On Fri, Dec 01, 2023 at 15:06:23 +0200, Dmitry Gutov wrote:
> On 01/12/2023 14:49, Alan Mackenzie wrote:
> > On a recent Emacs master:
> > (i) emacs -Q
> > (ii) In*scratch* enter the following:
> > (byte-compile (lambda (x) "doc" "foo"))
> > .
> > (iii) Enter C-u C-x C-e to evaluate the form. The result looks like:
> > #[257 "\300\207" [nil] 2 "doc
> > (fn X)"]
> > . This is incorrect. The only form in the constants vector is nil.
> > It should be "foo".
> > (iv) Note that this only happens with the unused parameter x. Without
> > it, the form compiles correctly.
> Might be a bug in the interpreter too?
> (funcall (lambda (x) "doc" "foo") 2)
> ;; => nil
Outch! Thanks for spotting that, it might make the bug easier to solve.
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2023-12-01 14:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-01 12:49 bug#67568: Emacs master: Bug in byte compiler when there's an unused parameter Alan Mackenzie
2023-12-01 13:06 ` Dmitry Gutov
2023-12-01 14:16 ` Alan Mackenzie [this message]
2023-12-01 15:22 ` Alan Mackenzie
2023-12-01 15:40 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-12-01 16:34 ` Alan Mackenzie
2023-12-03 15:55 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-12-03 16:21 ` Eli Zaretskii
2023-12-03 19:24 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-12-03 19:28 ` Eli Zaretskii
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