* Summary
With visual-line-mode and org-indent-mode activated, C-a and C-e
misbehaves on indented text blocks. C-a and C-e sometimes start jumping
over lines (ie, go backwards or forward one extra line) and sometimes
even reverses direction (C-e goes backward). I can reproduce this from
emacs -Q with builtin Org 8.2.10. The issue can also be reproduced
without enabling org-indent-mode, although it is much less severe
without it.
* Steps to reproduce
>From emacs -Q:
1. Open the attached document, or create a new org-mode file with an
heading and a (preferably long) paragraph or text under it.
2. Enable visual-line-mode and org-indent-mode
3. Reduce Emacs frame width.
4. With text-scale-mode or (set-frame-parameter), seriously increase
the font size (if it can't display more than two or three words per
line, that's perfect).
5. Go to the last character of the huge paragraph.
6. Start playing with C-a and C-e. The cursor will wander erratically
within the paragraph, often in the wrong direction.
Notice: setting the frame width, the font size and going to the end of
the document is not strictly required, as the bug will appear sooner or
later, but in my tests it made it appear much faster, in a matter of
seconds.]
I'm using Emacs 25.2rc2 with org 9.0.5 from ELPA, but have been
experiencing this since Emacs 24.5 and the built-in Org (8.x I believe).
I can reproduce under the same conditions with the built-in org of Emacs
25.2rc2 as well.
Thanks a lot for your help,
Thibault
* This will break
On the other hand, we denounce with righteous indignation and dislike men who are so beguiled and demoralized by the charms of pleasure of the moment, so blinded by desire, that they cannot foresee the pain and trouble that are bound to ensue; and equal blame belongs to those who fail in their duty through weakness of will, which is the same as saying through shrinking from toil and pain. These cases are perfectly simple and easy to distinguish. In a free hour, when our power of choice is untrammelled and when nothing prevents our being able to do what we like best, every pleasure is to be welcomed and every pain avoided. But in certain circumstances and owing to the claims of duty or the obligations of business it will frequently occur that pleasures have to be repudiated and annoyances accepted. The wise man therefore always holds in these matters to this principle of selection: he rejects pleasures to secure other greater pleasures, or else he endures pains to avoid worse pains.
