wget has no problem with it:
root@b1:~# wget 📙.la
--2019-01-17 20:53:17-- http://xn--yt8h.la/
Resolving xn--yt8h.la (xn--yt8h.la)... 62.116.130.8
Connecting to xn--yt8h.la (xn--yt8h.la)|62.116.130.8|:80... connected.
...
root@b1:~# curl 📙.la
curl: (3) Failed to convert 📙.la to ACE; string contains a disallowed character
Yet, both link to libidn2:
root@b1:~# ldd $(which wget) | grep idn
libidn2.so.0 => /usr/lib/x86_64-linux-gnu/libidn2.so.0
(0x00007fc8ce5ba000)
root@b1:~# ldd $(which curl) | grep idn
libidn2.so.0 => /usr/lib/x86_64-linux-gnu/libidn2.so.0
(0x00007f295d476000)
So maybe it's a bug in curl itself?
Additional info:
root@b1:~# apt-cache policy curl wget
curl:
Installed: 7.58.0-2ubuntu3.5
Candidate: 7.58.0-2ubuntu3.5
Version table:
*** 7.58.0-2ubuntu3.5 500
500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64
Packages
100 /var/lib/dpkg/status
7.58.0-2ubuntu3 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
wget:
Installed: 1.19.4-1ubuntu2.1
Candidate: 1.19.4-1ubuntu2.1
Version table:
*** 1.19.4-1ubuntu2.1 500
500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64
Packages
100 /var/lib/dpkg/status
1.19.4-1ubuntu2 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1771109
Title:
Domain names containing emoji characters are not supported in console
applications
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1771109/+subscriptions
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