On Fri, 27 Jan 2017 13:23:53, "Eric Blake (cygwin)" wrote:
> A new release of bash, 4.4.12-3, has been uploaded and will soon reach a
> mirror near you.
Bash printf cannot handle any Unicode blocks starting with "Private Use Area"
(U+E000 - U+F8FF). Note I will be skipping the surrogate blocks[1] (U+D800 -
U+DFFF) for this post, as /bin/printf does not support them either[2]:
$ bash -c 'printf \\uD7FF' | od -tcx1
0000000 355 237 277
ed 9f bf
$ bash -c 'printf \\uE000' | od -tcx1
0000000 355 237 270 355 260 200
ed 9f b8 ed b0 80
$ /bin/printf '\uD7FF' | od -tcx1
0000000 355 237 277
ed 9f bf
$ /bin/printf '\uE000' | od -tcx1
0000000 356 200 200
ee 80 80
Tested with these environments:
cygwin-20170119 bash-4.4.12
cygwin-20170119 bash-4.4.11
cygwin-20170119 bash-4.4.5
cygwin-20170119 bash-4.3.48
cygwin-2.6.1 bash-4.4.12
cygwin-2.6.1 bash-4.4.11
cygwin-2.6.1 bash-4.4.5
cygwin-2.6.1 bash-4.3.48
cygwin-2.6.0 bash-4.4.12
cygwin-2.6.0 bash-4.4.11
cygwin-2.6.0 bash-4.4.5
cygwin-2.6.0 bash-4.3.48
This appears to be Cygwin specific: I tested also on Debian 8.7.1 without issue.
[1] http://wikipedia.org/wiki/Universal_Character_Set_characters#Surrogates
[2] http://lists.gnu.org/archive/html/bug-coreutils/2008-05/msg00068
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