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bug#11421: call-process behavior wrt. to read only buffers depends on co
From: |
Lars Ingebrigtsen |
Subject: |
bug#11421: call-process behavior wrt. to read only buffers depends on coding system for read operations |
Date: |
Thu, 03 Oct 2019 19:08:30 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Rob Browning <rlb@defaultvalue.org> writes:
> It appears that depending on the LOCALE setting, Emacs 23.4 may or may
> not signal a "buffer is read-only" error. At least here, this can be
> demonstrated as follows.
>
> Save to ./test.el:
>
> (let ((buf (get-buffer-create "xxx")))
> (with-current-buffer buf
> (compilation-mode))
> (let ((coding-system-for-read 'iso-latin-1-unix))
> (condition-case err
> (progn
> (call-process "/bin/cat" "/proc/cpuinfo" buf t)
> (message "iso-latin-1-unix: No call-process error"))
> (error
> (message "iso-latin-1-unix: call-process error: %s %s"
> (car err) (cdr err)))))
> (let ((coding-system-for-read 'utf-8-unix))
> (condition-case err
> (progn
> (call-process "/bin/cat" "/proc/cpuinfo" buf t)
> (message "utf-8-unix: No call-process error"))
> (error
> (message "utf-8-unix: call-process error: %s %s"
> (car err) (cdr err))))))
[...]
> which should produce something like this:
>
> iso-latin-1-unix: call-process error: buffer-read-only (xxx)
> utf-8-unix: No call-process error
When I try this in Emacs 27, I get:
Waiting for process to die...done
iso-latin-1-unix: call-process error: buffer-read-only (xxx)
Waiting for process to die...done
utf-8-unix: call-process error: buffer-read-only (xxx)
Can you still reproduce this bug on modern Emacs versions?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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