[Bug 1699086] [NEW] add-apt-repository crashes on non-ascii names in PGP keys

[Rob Lazzurs]

Public bug reported:

When adding the PHP 7.1 repo into Ubuntu 16.04 LTS I get the following
error.

Command;
add-apt-repository ppa:ondrej/php -y

Output;
gpg: keyring `/tmp/tmprs_t5_d6/secring.gpg' created
gpg: keyring `/tmp/tmprs_t5_d6/pubring.gpg' created
gpg: requesting key E5267A6C from hkp server keyserver.ubuntu.com
gpg: /tmp/tmprs_t5_d6/trustdb.gpg: trustdb created
gpg: key E5267A6C: public key "Launchpad PPA for Ond\xc5\x99ej Sur�" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
'ascii' codec can't decode byte 0xc5 in position 92: ordinal not in range(128)

The command exits with code 1.

** Affects: software-properties (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1699086

Title:
  add-apt-repository crashes on non-ascii names in PGP keys

Status in software-properties package in Ubuntu:
  New

Bug description:
  When adding the PHP 7.1 repo into Ubuntu 16.04 LTS I get the following
  error.

  Command;
  add-apt-repository ppa:ondrej/php -y

  Output;
  gpg: keyring `/tmp/tmprs_t5_d6/secring.gpg' created
  gpg: keyring `/tmp/tmprs_t5_d6/pubring.gpg' created
  gpg: requesting key E5267A6C from hkp server keyserver.ubuntu.com
  gpg: /tmp/tmprs_t5_d6/trustdb.gpg: trustdb created
  gpg: key E5267A6C: public key "Launchpad PPA for Ond\xc5\x99ej Sur�" imported
  gpg: Total number processed: 1
  gpg:               imported: 1  (RSA: 1)
  'ascii' codec can't decode byte 0xc5 in position 92: ordinal not in range(128)

  The command exits with code 1.

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