ubiquity crashed with BrokenPipeError in command(): [Errno 32] Broken pipe during manual saucy desktop installations

[Para Siva]

This crash occurred during the start of the installations of both amd64 and i386 images of 20130628 on a VM (libvirt & KVM) and real hardware. This occurs on both live-session based and direct installations.

Steps to reproduce:
1. Start the installation
2. Press a key at human-keyboard screen
3. Select Install Ubuntu
4. This crash could be seen

From UbiquitySyslog>

Jun 28 10:39:02 ubuntu ubiquity[2496]: switched to page language
Jun 28 10:39:02 ubuntu ubiquity[2496]: Exception in GTK frontend (invoking crash handler):
Jun 28 10:39:02 ubuntu ubiquity[2496]: Traceback (most recent call last):
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 701, in <lambda>
Jun 28 10:39:02 ubuntu ubiquity[2496]: func_fdtransform = lambda _, cond, data: func(channel, cond, data)
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1526, in watch_debconf_fd_helper
Jun 28 10:39:02 ubuntu ubiquity[2496]: return callback(source, debconf_condition)
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 265, in process_input
Jun 28 10:39:02 ubuntu ubiquity[2496]: self.status = self.wait()
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 161, in wait
Jun 28 10:39:02 ubuntu ubiquity[2496]: self.cleanup()
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/ubiquity/plugins/ubi-language.py", line 705, in cleanup
Jun 28 10:39:02 ubuntu ubiquity[2496]: i18n.reset_locale(self.frontend)
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/ubiquity/ubiquity/i18n.py", line 35, in reset_locale
Jun 28 10:39:02 ubuntu ubiquity[2496]: di_locale = frontend.db.get('debian-installer/locale')
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/python3/dist-packages/debconf.py", line 62, in <lambda>
Jun 28 10:39:02 ubuntu ubiquity[2496]: lambda *args, **kw: self.command(command, *args, **kw))
Jun 28 10:39:02 ubuntu ubiquity[2496]: File "/usr/lib/python3/dist-packages/debconf.py", line 66, in command
Jun 28 10:39:02 ubuntu ubiquity[2496]: self.write.write("%s %s\n" % (command, ' '.join(map(str, params))))
Jun 28 10:39:02 ubuntu ubiquity[2496]: BrokenPipeError: [Errno 32] Broken pipe

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: ubiquity 2.15.8
ProcVersionSignature: Ubuntu 3.10.0-0.7-generic 3.10.0-rc7
Uname: Linux 3.10.0-0-generic x86_64
ApportVersion: 2.10.2-0ubuntu3
Architecture: amd64
CasperVersion: 1.335
Date: Fri Jun 28 10:39:02 2013
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash --
InterpreterPath: /usr/bin/python3.3
LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130628)
MarkForUpload: True
ProcCmdline: /usr/bin/python3 /usr/lib/ubiquity/bin/ubiquity --only
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/2496/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--only']
SourcePackage: ubiquity
Title: ubiquity crashed with BrokenPipeError in command(): [Errno 32] Broken pipe
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Jackson Doak (noskcaj)]

May i suggest this becomes critical?

[Fabio Marconi (fabiomarconi)]

reproducible in 20130629 too, set as critical
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[Carla Sella (carla-sella)]

This also happened to me with this ISO: http://cdimage.ubuntu.com/daily-live/20130629/saucy-desktop-amd64.iso.
Just booted my HP G62 laptop from live USB key, after purple screen with human-keyboard screen and before welcom window, ubuquity crashed with broken pipe error in command():[Errno 32]Broken Pipe.

[Carla Sella (carla-sella)]

I'm attaching crash file from /var/crash, not sure it will help though.

[Fabio Marconi (fabiomarconi)]

fixed in 20130630
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