From: Michael Heerdegen <michael_heerdegen@web.de>
To: Paul Pogonyshev <pogonyshev@gmail.com>
Cc: mattiase@acm.org, Stefan Monnier <monnier@iro.umontreal.ca>,
51982@debbugs.gnu.org
Subject: bug#51982: Erroneous handling of local variables in byte-compiled nested lambdas
Date: Sat, 20 Nov 2021 05:44:38 +0100 [thread overview]
Message-ID: <87y25jo2q1.fsf@web.de> (raw)
In-Reply-To: <CAG7BpaoBrzWZK01+FAwhbO04HXgWXxGqe31GmphQOAA_Cgv3=g@mail.gmail.com> (Paul Pogonyshev's message of "Fri, 19 Nov 2021 21:31:13 +0100")
Hello Paul,
thanks for the report, I can reproduce the issue, there is something
going wrong when compiling. I guess this is something for Mattias or
Stefan maybe? (CC'd)
#+begin_src emacs-lisp
; -*- lexical-binding: t -*-
(defun wtf (x)
(let ((it 0))
#'(lambda ()
(let ((fn #'(lambda () it)))
(if x
(let ((it x))
it)
(funcall fn))))))
#+end_src
Byte compile:
> wtf.el:9:17:Warning: reference to free variable ‘it’
(funcall (wtf 1))
> Symbol’s value as variable is void: it
while expected result is 1. Uncompiled code works as expected.
TIA,
Michael.
next prev parent reply other threads:[~2021-11-20 4:44 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-19 20:31 bug#51982: Erroneous handling of local variables in byte-compiled nested lambdas Paul Pogonyshev
2021-11-20 4:44 ` Michael Heerdegen [this message]
2021-11-20 8:45 ` Mattias Engdegård
2021-11-20 10:51 ` Michael Heerdegen
2021-11-20 16:54 ` Paul Pogonyshev
2021-11-20 17:04 ` Mattias Engdegård
2021-11-20 17:22 ` Paul Pogonyshev
2021-11-20 18:34 ` Mattias Engdegård
2021-11-20 20:53 ` Paul Pogonyshev
2021-11-21 7:59 ` Michael Heerdegen
2021-11-21 9:59 ` Mattias Engdegård
2021-11-22 10:29 ` Michael Heerdegen
2021-11-22 13:56 ` Mattias Engdegård
2021-11-22 17:35 ` Mattias Engdegård
2021-11-30 14:12 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-30 17:01 ` Mattias Engdegård
2021-11-30 22:41 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-12-01 16:04 ` Mattias Engdegård
2021-12-01 18:34 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-12-01 22:32 ` Mattias Engdegård
2021-12-02 9:13 ` Mattias Engdegård
2022-09-09 17:59 ` Lars Ingebrigtsen
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