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bug#59714: 30.0.50; (void-function cl-letf)
From: |
Eli Zaretskii |
Subject: |
bug#59714: 30.0.50; (void-function cl-letf) |
Date: |
Wed, 30 Nov 2022 15:47:19 +0200 |
> Date: Wed, 30 Nov 2022 07:45:51 +0100
> From: Manuel Uberti via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
> this is the problem:
>
> - emacs -Q
> - Evaluate: (cl-letf (((default-value 'process-environment) nil)))
> - You see the following error:
>
> Debugger entered--Lisp error: (void-function cl-letf)
> (cl-letf (((default-value 'process-environment) nil)))
> (progn (cl-letf (((default-value 'process-environment) nil))))
> eval((progn (cl-letf (((default-value 'process-environment) nil)))) t)
> elisp--eval-last-sexp(nil)
> eval-last-sexp(nil)
> funcall-interactively(eval-last-sexp nil)
> call-interactively(eval-last-sexp nil nil)
> command-execute(eval-last-sexp)
>
> - Evaluate again: (cl-letf (((default-value 'process-environment) nil)))
>
> The error is not shown any more.
Why is this a problem? Before you evaluate the offending expression,
(featurep 'cl-lib) yields nil, after that it yields t (because Emacs needed
to load that package). I don't see what is wrong here.