[Bug 1971715] Re: 22.04 idn -a domain.com idn: could not convert from ASCII to UTF-8

[Steve Langasek]

Hello Jaap, or anyone else affected,

Accepted libidn into jammy-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/libidn/1.38-4ubuntu1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
jammy to verification-done-jammy. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-jammy. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: libidn (Ubuntu Jammy)
       Status: Confirmed => Fix Committed

** Tags added: verification-needed verification-needed-jammy

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https://bugs.launchpad.net/bugs/1971715

Title:
  22.04 idn -a domain.com idn: could not convert from ASCII to UTF-8

Status in libidn package in Ubuntu:
  Fix Released
Status in libidn source package in Jammy:
  Fix Committed
Status in libidn source package in Kinetic:
  Fix Released

Bug description:
  [ Impact ]

  idn cannot handle non-ASCII characters

  [ Test Plan ]

  Existing state in 22.04:

  $ echo ü | idn
  idn: could not convert from ASCII to UTF-8

  Fixed output:

  $ echo ü | idn
  xn--tda

  [ Where problems could occur ]

  The patch enables an extra autotools features, so the most likely
  problem is a build failure. Currently non-ASCII characters are
  entirely unhandled, so there's no risk of regression there, but this
  could potentially turn clean failures into crashes or incorrect
  output.

  [Original report]

  On Ubuntu 22.04 Jammy:

  idn -a "xxx-tést.eu"
  idn: could not convert from ASCII to UTF-8

  And

  idn -u "xn--xxx-tst-fya.eu"
  idn: could not convert from UTF-8 to ASCII

  Expected:
  Successfully conversion from ASCII to UTF-8

  Ubuntu 20.04 / 18.04 it works fine

  Also with idn2 from UTF-8 to ASCII works as expected how ever support
  lacks from ASCII to UTF-8

  Description:	Ubuntu 22.04 LTS
  Release:	22.04

  root at test:~# echo $LC_ALL
  C.UTF-8

  root at test:~# apt-cache policy  idn
  idn:
    Installed: 1.38-4build1
    Candidate: 1.38-4build1
    Version table:
   *** 1.38-4build1 500
          500 https://mirror.hetzner.com/ubuntu/packages jammy/universe amd64 Packages
          100 /var/lib/dpkg/status

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