address@hidden: part of display property on before-string property is not displayed]

[Richard Stallman]

[I sent this message a weeks ago but did not get a response.]

Would someone please fix this and ack?

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To: address@hidden
From: Joe Wells <address@hidden>
Date: Tue, 18 Sep 2007 23:04:11 +0100
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Subject: part of display property on before-string property is not displayed

When a string is the display property of a portion of a before-string
property of an overlay, part of the display property can disappear.
In this case the first character of the display property does not get
shown.

Reproduce by evaluating this code:

  (let ((buf (get-buffer-create "foo")))
    (with-current-buffer buf
      (display-buffer buf)
      (erase-buffer)
      (dolist (o (overlays-in (point-min) (point-max)))
        (delete-overlay o))
      (insert "ABC")
      (let ((o (make-overlay 2 3))
            (s (copy-sequence "DEF")))
        (put-text-property 1 2 'display "123" s)
        (overlay-put o 'display "Y")
        (overlay-put o 'before-string s))))

You will see the ?foo? window pop up and in the window you will see
?AD23FYC?.  I expected that instead ?AD123FYC? would be shown.

This seems like a bug.

Thanks for your time in considering this bug report.

Joe

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