bugGNU Screen - Bugs: bug #27586, broken support for unicode plane 1


bug #27586: broken support for unicode plane 1

Submitted by:  Arc Riley <arcx>
Submitted on:  Sat 03 Oct 2009 05:12:52 AM UTC  
Category: Program LogicSeverity: 3 - Normal
Priority: 5 - NormalStatus: None
Privacy: PublicAssigned to: None
Open/Closed: OpenRelease: 4.0.3
Fixed Release: NonePlanned Release: None
Work Required: None

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Fri 22 Oct 2010 08:52:18 PM UTC, comment #3:

Awesome. Not only is screen broken in this regard, but so is Savannah (it truncated my earlier comment).

Here it is again, reproduced entirely in ASCII.

I just ran into this issue, so I tried out the unicode++ branch.

Sure enough, code points such as <U+26ED9> come out correctly, and they seem to work in copy+paste, scrollback, writebuf, etc.

However, there are problems with the language tag characters (U+E0000 through U+E007F, as they get mangled by screen. For example, if I output the text,


screen turns it into a bunch of garbage that mutates as you scroll or move the copy cursor around. The results differ every time the text is output, too. This text disrupts screen's notion of where lines start and end: after printing this text, the copy mode cursor does not appear on the line that is actually being copied.

Nick Bowler <draconx>
Fri 22 Oct 2010 08:49:05 PM UTC, comment #2:

I just ran into this issue, so I tried out the unicode++ branch.

Sure enough, code points such as <U+26ED9> (

Nick Bowler <draconx>
Fri 05 Mar 2010 10:34:32 AM UTC, comment #1:

The 'unicode++' branch in the official repository [1] should now support plane-1 unicode stuff. Using this branch, I can visit, for example, http://www.code2000.net/oneplane.htm, and the characters do not show up as '?' any more.

If you (or anyone) could try it out, that'd be great. If someone's testing, please also test copy/paste from the scrollback, writebuf, hardcopy etc. commands.

[1] http://git.savannah.gnu.org/gitweb/?p=screen.git;a=shortlog;h=refs/heads/unicode%2B%2B

Sadrul Habib Chowdhury <sadrul>
Project Administrator
Sat 03 Oct 2009 05:12:52 AM UTC, original submission:

I have my locale and screen setup properly for en_US.UTF-8

Unicode characters below uffff appear fine, while unicode characters above u10000 appear as a ?.

The same unicode characters work fine outside of screen in the same terminal.

Arc Riley <arcx>


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Carbon-Copy List
  • -unavailable- added by inimino
  • -unavailable- added by draconx (Posted a comment)
  • -unavailable- added by sadrul (Posted a comment)
  • -unavailable- added by arcx (Submitted the item)

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    Date Changed By Updated Field Previous Value => Replaced By
    Thu 23 Jun 2011 04:42:55 AM UTCiniminoCarbon-Copy-=>Added inimino
    Fri 22 Oct 2010 08:53:20 PM UTCdraconxCarbon-CopyRemoved -unavailable-=>-
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