GNU bug report logs - #20607
24.5; Problem with overlays at same position but in different windows

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Oleh Krehel <ohwoeowho <at> gmail.com>
Cc: 20607 <at> debbugs.gnu.org
Subject: bug#20607: 24.5; Problem with overlays at same position but in different windows
Date: Mon, 18 May 2015 21:59:26 +0300

> From: Oleh Krehel <ohwoeowho <at> gmail.com>
> Date: Mon, 18 May 2015 20:29:10 +0200
> 
> 
> Suppose I have two windows, WND1 and WND2, both displaying the same
> buffer. In WND1, there's an overlay from 1 to 2 with window property
> WND1 and display "ab". In WND2, there's an overlay from 1 to 3 with
> window property WND2 and display "abc".
> 
> Instead of the expected, I see "ab" in WND1, but "abcabc" in WND2.  When
> I `move-overlay' in the first window to 1-3, the glitch disappears, but
> I actually want the overlay to be 1-2, not 1-3. If I have to make it
> 1-3, I'd have to modify the display as well to include one more
> character from the buffer. I think it's better to fix the overlay logic
> rather than go for this work-around.

Please show the code to reproduce this.

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