GNU bug report logs - #11261
24.1.50; cursor doesn't move in a long line

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Katsumi Yamaoka <yamaoka <at> jpl.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.1.50; cursor doesn't move in a long line
Date: Tue, 17 Apr 2012 08:40:40 +0900

Hi,

When I view an html source, of which lines are very long, I meet
with a symptom that C-f, C-b, and so forth don't move the cursor.
One discovered yesterday that it happens only when the header line
exists in a buffer (we use emacs-w3m that ises the header line for
the tab browsing).  Here's a recipe to reproduce this with Emacs -Q:

(let ((fox "The quick brown fox jumps over the lazy dog."))
  (pop-to-buffer "*testing*")
  (erase-buffer)
  (setq header-line-format fox)
  (dotimes (var 1000)
    (insert fox "  "))
  (goto-char (point-min))
  (search-forward "fox" nil t 500))

Could this be fixed?

Thanks in advance.
Regards,

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