bug#46912: closed (28.0.50; Byte compiled defvar with lexical binding throws (void-variable foo))

[GNU bug Tracking System]

Your message dated Fri, 5 Mar 2021 09:56:28 +0000
with message-id 
<CAOqdjBdaV2a0BFgXGxmcp0BZK_7uVaq+graS-CCf65Ws3xM_TA@mail.gmail.com>
and subject line Re: bug#46912: 28.0.50; Byte compiled defvar with lexical 
binding throws (void-variable foo)
has caused the debbugs.gnu.org bug report #46912,
regarding 28.0.50; Byte compiled defvar with lexical binding throws 
(void-variable foo)
to be marked as done.

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46912: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=46912
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> --- Begin Message ---
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> Subject: 
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> 28.0.50; Byte compiled defvar with lexical binding throws (void-variable foo)
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> Date: 
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> Thu, 4 Mar 2021 01:14:50 +0100
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>
> Hello,
>
> Compiling the following file:
>
>     ;;; -*- lexical-binding: t -*-
>
>     (let ((foo t))
>       (defvar tmp-bar (if foo 0 1 -1)))
>
> gives:
>
>     tmp.el:4:23: Warning: reference to free variable ‘foo’
>
>
> When loading the .elc file the error
>
>     Debugger entered--Lisp error: (void-variable foo)
>       byte-code("\301\10\203\11\0\302\202\n\0\303!\207" [foo (lambda
> (def-tmp-var) (defvar tmp-bar def-tmp-var)) 0 -1] 2)
>       load(".../tmp.elc" nil nil t)
>
>
> No problems with emacs-27 branch.
>
>
>   Vitalie
>
>
>
> In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
> 3.22.30, cairo version 1.15.10)
>  of 2021-03-03 built on NB277
> Repository revision: a350ae058caedcb7be7d332564817954e3624e60
> Repository branch: HEAD
> Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
> System Description: Ubuntu 18.04.5 LTS
>
>
>
> --- End Message ---
> --- Begin Message ---
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>
>
> Subject: 
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> Re: bug#46912: 28.0.50; Byte compiled defvar with lexical binding throws (void-variable foo)
>
>
>
>
> Date: 
>
> Fri, 5 Mar 2021 09:56:28 +0000
>
>
>
>
> On Fri, Mar 5, 2021 at 9:11 AM Mattias Engdegård <mattiase@acm.org> wrote:
> > 4 mars 2021 kl. 22.08 skrev Pip Cet <pipcet@gmail.com>:
> >
> > > Not a problem at all. In fact, I've taken a look and it seems
> > > byte-optimize-form-code-walker simply ignores the value form in a
> > > defvar now..
> >
> > Oh dear, what a silly mistake. Thank you for finding it so quickly, and that 
> > (last, corrected) patch of yours looks sound -- please push it right away.
>
> Done, and closing. Sorry about the first patch, I must have "tested"
> it after setting byte-optimize to nil...
>
> Pip
>
>
> --- End Message ---