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From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: dick <dick.r.chiang@gmail.com>
Cc: 46722@debbugs.gnu.org
Subject: bug#46722: test-map-into fails
Date: Wed, 05 Jan 2022 11:38:03 -0500	[thread overview]
Message-ID: <jwvk0fervj8.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <875yqyw4me.fsf@dick> (dick's message of "Wed, 05 Jan 2022 11:04:41 -0500")

>> Does the patch below help?

No, it doesn't because I see now that we already fixed this bug by
binding `lexical-binding` (just a bit further above).

> I don't see why it would if this doesn't work:
>
> (let ((lexical-binding t))
>   (funcall
>    (funcall
>     (backquote
>      (lambda (arg)
>        (lambda () arg)))
>     t)))

The effect of `lexical-binding` is different from what you think.
It applies to the moment a sexp passes from being "data" to the moment
it is labeled as "code", not to the moment the code is executed
(otherwise we couldn't compile the code of functions ahead of time, not
knowing which value of `lexical-binding` would be active when the code
will be executed).

> While I remain leery of the fast and loose scoping here, it was but a red
> herring.

Indeed,


        Stefan






  reply	other threads:[~2022-01-05 16:38 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-23 16:22 bug#46722: test-map-into fails Glenn Morris
2021-02-23 16:33 ` Basil L. Contovounesios
2021-02-23 17:06   ` Glenn Morris
2021-02-23 17:30   ` Stefan Monnier
2021-02-23 20:58     ` Basil L. Contovounesios
2021-02-23 22:50       ` Basil L. Contovounesios
2021-04-04 16:05 ` Glenn Morris
2021-11-17  8:47 ` Stefan Kangas
2021-11-29 18:20   ` Glenn Morris
2021-11-29 18:26     ` Lars Ingebrigtsen
2021-11-29 18:40       ` Glenn Morris
2022-01-04 21:56         ` dick
2022-01-05 14:01           ` dick
2022-01-05 16:31             ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-05 17:51               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-05 18:07                 ` Eli Zaretskii
2022-01-05 18:24                   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-13 19:23                     ` Philipp Stephani
2022-01-13 20:40                       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-13 20:45                         ` Philipp Stephani
2022-01-14  7:40                           ` Lars Ingebrigtsen
2022-01-14 12:02                             ` Philipp Stephani
2022-01-15  8:01                               ` Lars Ingebrigtsen
2022-01-15 11:47                                 ` Philipp Stephani
2022-01-15 15:16                                   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-15 15:55                                     ` Eli Zaretskii
2022-01-20 12:49                                       ` Lars Ingebrigtsen
2022-01-05 15:17           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-05 16:04             ` dick
2022-01-05 16:38               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2022-01-05 18:35           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-05 18:59             ` dick
2022-01-05 19:17               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors

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