GNU bug report logs - #25965
26.0.50; iter-lambda may evaluate certain forms twice

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Package: emacs;

Reported by: Andreas Politz <politza <at> hochschule-trier.de>

Date: Sat, 4 Mar 2017 08:04:01 UTC

Severity: normal

Tags: patch

Found in version 26.0.50

Done: Gemini Lasswell <gazally <at> runbox.com>

Bug is archived. No further changes may be made.

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From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Andreas Politz <politza <at> hochschule-trier.de>, Daniel Colascione <dancol <at> dancol.org>
Cc: 25965 <at> debbugs.gnu.org
Subject: bug#25965: 26.0.50; iter-lambda may evaluate certain forms twice
Date: Wed, 08 Mar 2017 16:52:13 -0500

> The unwind-protect form is created in this function.
>
> #+BEGIN_SRC emacs-lisp
>   (defun cps--make-dynamic-binding-wrapper (dynamic-var static-var)
>     (cl-assert lexical-binding)
>     (lambda (form)
>       `(let ((,dynamic-var ,static-var))
>          (unwind-protect ; Update the static shadow after evaluation is done
>               ,form
>            (setf ,static-var ,dynamic-var))
>          ,form)))
> #+END_SRC
>
> And it seems to me that the second occurrence of ,form is just an
> error.

Hmm... indeed that looks odd, and maybe just removing the second ,form
is the right fix.  Daniel, do you happen to remember what the second
,form above is meant to do?


        Stefan
This bug report was last modified 7 years and 230 days ago.

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