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* [Bug libc/26207] New: wcwidth() returns -1 for numerous emoji added by unicode 13.0
@ 2020-07-05 17:08 nickblack at linux dot com
2020-12-21 2:45 ` [Bug libc/26207] " jscott at posteo dot net
0 siblings, 1 reply; 2+ messages in thread
From: nickblack at linux dot com @ 2020-07-05 17:08 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=26207
Bug ID: 26207
Summary: wcwidth() returns -1 for numerous emoji added by
unicode 13.0
Product: glibc
Version: 2.33
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: nickblack at linux dot com
CC: drepper.fsp at gmail dot com
Target Milestone: ---
This is with the 2.33 candidate, commit ca3549c8. I see the same behavior on my
vendor (Debian Unstable, glibc 2.30-8) glibc.
In a proper UTF-8 locale (LANG="en_US.UTF-8"), wcwidth() returns -1 for a
number of emoji introduced by Unicode 13.0. I've prepared what I believe to be
an exhaustive list:
U+01f972
U+01f978
U+01f90c
U+01fac0
U+01fac1
U+01f9ac
U+01f9a3
U+01f9ab
U+01f9a4
U+01fab6
U+01f9ad
U+01fab2
U+01fab3
U+01fab0
U+01fab1
U+01fab4
U+01fad0
U+01fad2
U+01fad1
U+01fad3
U+01fad4
U+01fad5
U+01fad6
U+01f9cb
U+01faa8
U+01fab5
U+01f6d6
U+01f6fb
U+01f6fc
U+01fa84
U+01fa85
U+01fa86
U+01faa1
U+01faa2
U+01fa74
U+01fa96
U+01fa97
U+01fa98
U+01fa99
U+01fa83
U+01fa9a
U+01fa9b
U+01fa9d
U+01fa9c
U+01f6d7
U+01fa9e
U+01fa9f
U+01faa0
U+01faa4
U+01faa3
U+01faa5
U+01faa6
U+01faa7
while all of these values have a high 17th bit, there are numerous codepoints
with a high 17th bit for which glibc returns a correct wcwidth() value.
This was discovered while developing the "Mojibake" demo of Notcurses:
https://github.com/dankamongmen/notcurses/blob/master/src/demo/mojibake.c
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* [Bug libc/26207] wcwidth() returns -1 for numerous emoji added by unicode 13.0
2020-07-05 17:08 [Bug libc/26207] New: wcwidth() returns -1 for numerous emoji added by unicode 13.0 nickblack at linux dot com
@ 2020-12-21 2:45 ` jscott at posteo dot net
0 siblings, 0 replies; 2+ messages in thread
From: jscott at posteo dot net @ 2020-12-21 2:45 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=26207
John Scott <jscott at posteo dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jscott at posteo dot net
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2020-07-05 17:08 [Bug libc/26207] New: wcwidth() returns -1 for numerous emoji added by unicode 13.0 nickblack at linux dot com
2020-12-21 2:45 ` [Bug libc/26207] " jscott at posteo dot net
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