[Bug 858773] Re: btrfs /target fails: install.py crashed with AssertionError in __init__(): Failed to mount the target: /target

[Apport retracing service]

*** This bug is a duplicate of bug 626775 ***
    https://bugs.launchpad.net/bugs/626775

Thank you for taking the time to report this crash and helping to make
Ubuntu better.  This particular crash has already been reported and is a
duplicate of bug #626775, so is being marked as such.  Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** Tags removed: need-duplicate-check

** Attachment removed: "Dependencies.txt"
   https://bugs.launchpad.net/bugs/858773/+attachment/2456967/+files/Dependencies.txt

** Attachment removed: "ProcMaps.txt"
   https://bugs.launchpad.net/bugs/858773/+attachment/2456968/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   https://bugs.launchpad.net/bugs/858773/+attachment/2456969/+files/ProcStatus.txt

** This bug has been marked a duplicate of bug 626775
   install.py crashed with AssertionError in __init__()

** Visibility changed to: Public

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https://bugs.launchpad.net/bugs/858773

Title:
  btrfs /target fails: install.py crashed with AssertionError in
  __init__(): Failed to mount the target: /target

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  Install crashed while creating file systems (with 32bit desktop 11.04
  this works. I doubt it's the btrfs for root here (as also the the
  ubuntu 11.04 alternate 32bit CD install also fails to mount /target
  (btrfs root), while installing, which I haven't reported elsewhere as
  a bug):

  sda6 ext4 /boot 80MB
  sda7 btrfs / 12.5GB
  sda8 ext4 /home >30GB
  sda9 swap ~2GB

  To enable compress=lzo ASAP for root, I loop (had no problem with
  32bit) this in terminal window while installing:

  while [ ! `mount | fgrep 'compress'` ]; do mount /target -o
  remount,compress=lzo; sleep .7; date; done

  But the bug repeats even whithout this loop.

  I think I have 64bit architecture hardware, as `cat /proc/cpuinfo |
  fgrep -c lm` returns 2.

  ProblemType: Crash
  DistroRelease: Ubuntu 11.04
  Package: ubiquity 2.6.10
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic x86_64
  Architecture: amd64
  Date: Sun Sep 25 12:21:12 2011
  ExecutablePath: /usr/share/ubiquity/install.py
  InterpreterPath: /usr/bin/python2.7
  LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  ProcCmdline: /usr/bin/python /usr/share/ubiquity/install.py
  ProcEnviron:
   LANGUAGE=fi_FI.UTF-8
   PATH=(custom, no user)
   LANG=fi_FI.UTF-8
   SHELL=/bin/bash
   LC_COLLATE=C
  PythonArgs: ['/usr/share/ubiquity/install.py']
  SourcePackage: ubiquity
  Title: install.py crashed with AssertionError in __init__(): Failed to mount the target: /target
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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