Using of IPv6 address in url for preseed file causes an error in installer

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== Comment: #0 - IRINA YASHINA - 2016-02-18 07:31:18 ==
I tried to install Ubuntu16.04 with preseed file.
When IPv6 address was used in preseed/url:

preseed/url=http://[fd00:9:152:48:1822:ffff:162:199]/ubuntu/ira/s83lp25.preseed

the error message with wrong url appeared in installer (error scrinshot),
the preseed file couldn't be used.

In the syslog we can see the following messages with incorrectly changed url:

Feb 18 07:33:31 main-menu[501]: DEBUG: resolver (libc6-udeb): package doesn't exist (ignored)
Feb 18 07:33:31 main-menu[501]: INFO: Menu item 'network-preseed' selected
Feb 18 07:34:48 main-menu[501]: (process:517): http://[fd00.boeblingen.de.ibm.com:9:152:48:1822:ffff:162:199]/ubuntu/ira/s83lp25.preseed: Invalid IPv6 numeric address.
Feb 18 07:34:48 main-menu[501]: WARNING **: Configuring 'network-preseed' failed with error code 1
Feb 18 07:34:48 main-menu[501]: WARNING **: Menu item 'network-preseed' failed.
Feb 18 07:35:14 main-menu[501]: INFO: Modifying debconf priority limit from 'high' to 'medium'
Feb 18 07:35:14 debconf: Setting debconf/priority to medium
Feb 18 07:35:14 main-menu[501]: DEBUG: resolver (libc6-udeb): package doesn't exist (ignored)

The syslog is attached.

Here are the output of the 'fetch-url' and 'wget' commands in shell:

~ # fetch-url http://[fd00:9:152:48:1822:ffff:162:199]/ubuntu/ira/s83lp25.preseed
No such file or directory

~ # wget http://[fd00:9:152:48:1822:ffff:162:199]/ubuntu/ira/s83lp25.preseed
--2016-02-18 09:17:37-- http://[fd00:9:152:48:1822:ffff:162:199]/ubuntu/ira/s83lp25.preseed
Connecting to [fd00:9:152:48:1822:ffff:162:199]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 3390 (3.3K) [text/plain]
Saving to: 's83lp25.preseed'

s83lp25.preseed 100%[==================================================================================================================>] 3.31K --.-KB/s in 0s

2016-02-18 09:17:37 (883 MB/s) - 's83lp25.preseed' saved [3390/3390]

With IPv4 address in preseed/url no problems were found,
the preseed file was successfully applied in installer.

== Comment: #9 - IRINA YASHINA - 2016-02-19 05:22:35 ==
I've checked the last version of the installer:

http://ports.ubuntu.com/ubuntu-ports/dists/xenial/main/installer-s390x/20101020ubuntu423/

The bug still takes place.

== Comment: #10 - Hendrik Brueckner <email address hidden> - 2016-02-19 11:14:22 ==
I have opened a Debian bug to address this issue. A problem fix is also attached.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=815166

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[Launchpad Janitor (janitor)]

This bug was fixed in the package preseed - 1.71ubuntu1

---------------
preseed (1.71ubuntu1) xenial; urgency=low

  * Resynchronise with Debian. Remaining changes:
    - Change the "keymap" alias to keyboard-configuration/layoutcode.
    - Change default preseed root to "d-i/xenial/./preseed.cfg".

preseed (1.71) unstable; urgency=medium

  [ Hendrik Brueckner ]
  * auto-install: correctly handle IPv6 addresses Closes: #815166, LP:
    #1547629

preseed (1.70) unstable; urgency=medium

  [ Colin Watson ]
  * Use HTTPS for Vcs-* URLs, and link to cgit rather than gitweb.

preseed (1.69) unstable; urgency=medium

  [ Raphaël Hertzog ]
  * Invert env-preseed and initrd-preseed so that the former overrides
    the latter. Closes: #805291

 -- Dimitri John Ledkov <email address hidden> Wed, 24 Feb 2016 11:40:47 +0000

[Launchpad Janitor (janitor)]

This bug was fixed in the package debian-installer - 20101020ubuntu428

---------------
debian-installer (20101020ubuntu428) xenial; urgency=medium

  * Rebuild with preseed package that accepts IPv6 urls. LP: #1547629.

 -- Dimitri John Ledkov <email address hidden> Mon, 29 Feb 2016 14:57:05 +0000

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------- Comment From <email address hidden> 2016-03-02 08:15 EDT-------
The fix was successfully verified with 20101020ubuntu428.
The problem has been solved.