Comment 6 for bug 979350

Exception during installation:
Apr 11 20:52:47 ubuntu plugininstall.py: Traceback (most recent call last):
Apr 11 20:52:47 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1720, in <module>
Apr 11 20:52:47 ubuntu plugininstall.py: install.run()
Apr 11 20:52:47 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 57, in wrapper
Apr 11 20:52:47 ubuntu plugininstall.py: self.cleanup()
Apr 11 20:52:47 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1701, in cleanup
Apr 11 20:52:47 ubuntu plugininstall.py: misc.execute('umount', os.path.join(self.target, 'cdrom'))
Apr 11 20:52:47 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/misc.py", line 506, in execute
Apr 11 20:52:47 ubuntu plugininstall.py: status = subprocess.call(log_args)
Apr 11 20:52:47 ubuntu plugininstall.py: File "/usr/lib/python2.7/subprocess.py", line 493, in call
Apr 11 20:52:47 ubuntu plugininstall.py: return Popen(*popenargs, **kwargs).wait()
Apr 11 20:52:47 ubuntu plugininstall.py: File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
Apr 11 20:52:47 ubuntu plugininstall.py: errread, errwrite)
Apr 11 20:52:47 ubuntu plugininstall.py: File "/usr/lib/python2.7/subprocess.py", line 1143, in _execute_child
Apr 11 20:52:47 ubuntu plugininstall.py: self.pid = os.fork()
Apr 11 20:52:47 ubuntu plugininstall.py: OSError: [Errno 12] Cannot allocate memory
Apr 11 20:52:47 ubuntu plugininstall.py: