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[Weechat-dev] [bug #40985] Unicode character "ZERO WIDTH SPACE" causes d

From: Christopher O'Neill
Subject: [Weechat-dev] [bug #40985] Unicode character "ZERO WIDTH SPACE" causes display corruption
Date: Sun, 22 Dec 2013 11:22:43 +0000
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36


                 Summary: Unicode character "ZERO WIDTH SPACE" causes display
                 Project: WeeChat
            Submitted by: deltafire
            Submitted on: Sun 22 Dec 2013 11:22:42 GMT
                Category: display
                Severity: 3 - Normal
              Item Group: display
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 0.4.3-dev
                IRC nick: Deltafire



The unicode character "ZERO WIDTH SPACE" (utf-8 E2 80 8B) sometimes causes
characters to be missing from the prefix of the following line.

To reproduce:
1. Install the shell.py script.
2. Create the following python file 'test.py':

for i in range(30):
    print "%02d 01\xe2\x80\x8b23456789" % i
3. Join an empty channel, run /shell test.py a couple of times.
4. Scroll up and down the buffer, switch to different buffers and back again.

- ctrl-L fixes the display
- Switching to an empty buffer and back again causes no corruption
- Not all buffers cause corruption when switched to
- Sometimes characters from the previous buffer remain on screen
- Tested using iTerm2 and PuTTY
- Tested on FreeBSD 9.2 with Tmux 1.8


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