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The issue with with-temp-buffer (or with-current-buffer)
From: |
OGAWA Hirofumi |
Subject: |
The issue with with-temp-buffer (or with-current-buffer) |
Date: |
Sat, 16 Dec 2017 03:25:58 +0900 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Hi,
The following is the reproduce code of issue,
(let ((buf (get-buffer-create "test-case")))
(display-buffer buf)
(with-current-buffer buf
(erase-buffer)
(insert "1\n")
;; start suspect
(with-temp-buffer
(save-window-excursion
(set-window-buffer nil (current-buffer))))
;; end suspect
(insert "2\n")))
and expected result is
---- test-case ----
2
1
-------------------
But actual result is
---- test-case ----
1
2
-------------------
[The actual issue that I'm hitted was using `shr-insert-document'
like following. And above is simplied version to reproduce the issue.
(with-current-buffer buf
(erase-buffer)
(insert ...)
(shr-insert-document '(html nil (body nil ...)))
(insert ...)))
]
After some debugging, I noticed `with-current-buffer' that is
used in `with-temp-buffer' doesn't restore `point'.
And if I replaced `with-current-buffer' with
save-excursion+set-buffer, the issue is fixed.
I.e. from
(with-temp-buffer
to
(save-excursion
(set-buffer ,temp-buffer)
Well so, this behavior (doesn't restore point) of
`with-temp-buffer' (or `with-current-buffer') is intented or bug?
And to fix this issue, we should change which one of
with-temp-buffer, with-current-buffer, shr-insert-document, or
user of shr-insert-document?
Thanks.
--
OGAWA Hirofumi <address@hidden>
- The issue with with-temp-buffer (or with-current-buffer),
OGAWA Hirofumi <=