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bug#806: overlay display artifact: trace left behind

From: Jason Rumney
Subject: bug#806: overlay display artifact: trace left behind
Date: Tue, 09 Dec 2008 23:36:05 +0800
User-agent: Thunderbird (Windows/20081105)

Hi Drew,

Do you still see the bug below? I tried to follow your recipe, but the behaviour I saw was sufficiently different from that described that I am not sure that my tests are conclusive.

Package: emacs,w32

(Filing a report for old item from FOR-RELEASE.)


Initial report (todo: verify new font backend eliminates this and other
Cleartype related problems):

    1. emacs -Q

    2. Load this file: http://www.emacswiki.org/cgi-bin/wiki/mouse%2b.el

    3. Customize this face to have a red foreground:
    `mouse-flash-position'. (The default, yellow, is not very visible
    against an emacs -Q background.)

    4. M-: (global-set-key [down-mouse-2] 'mouse-flash-position)

    5. Select some text (e.g. a word), for yanking elsewhere.

    6. Put the mouse on some line of text. Press `mouse-2' and hold it
    pressed. Move the mouse along the text without releasing the button.
    Release it to finish the yank.

    When you press `mouse-2', the yank position is highlighted. When you
    move the mouse, the highlight moves with the mouse. But vestigial
    overlay traces are left behind.

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