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From: Artur Malabarba <bruce.connor.am@gmail.com>
To: 21201@debbugs.gnu.org
Subject: bug#21201: 25.0.50; (buffer-modified-p) errors inside cl-letf
Date: Thu, 6 Aug 2015 20:47:34 +0100	[thread overview]
Message-ID: <CAAdUY-LT61iKcFV=2zhJZN-MYyYbNvLQcwGTwBZXESv-DXUFWQ@mail.gmail.com> (raw)

From emacs -Q, run the following:

(cl-letf (((buffer-modified-p)))
  (insert "ookok"))

You'll get an error from trying to set a nil buffer.

Using `(buffer-modified-p (current-buffer))' instead works.

Backtrace:
Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  set-buffer(nil)
  (save-current-buffer (set-buffer nil) (set-buffer-modified-p old))
  (unwind-protect (insert "ookok") (save-current-buffer (set-buffer
nil) (set-buffer-modified-p old)))
  (let* ((old (buffer-modified-p))) (unwind-protect (insert "ookok")
(save-current-buffer (set-buffer nil) (set-buffer-modified-p old))))
  eval((let* ((old (buffer-modified-p))) (unwind-protect (insert
"ookok") (save-current-buffer (set-buffer nil) (set-buffer-modified-p
old)))) nil)
  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)





             reply	other threads:[~2015-08-06 19:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-06 19:47 Artur Malabarba [this message]
2015-08-06 20:07 ` bug#21201: 25.0.50; (buffer-modified-p) errors inside cl-letf Nicolas Richard
2015-08-06 21:44   ` Artur Malabarba
2015-08-06 22:50     ` Nicolas Richard
2018-07-17 12:16       ` Noam Postavsky
2018-08-28  0:01         ` Noam Postavsky

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