Comment 10 for bug 703552

Looks like you've found a bug in parted:

Jan 25 17:23:59 ubuntu ubiquity: Backtrace has 14 calls on stack:
Jan 25 17:23:59 ubuntu ubiquity: 14: /lib/libparted.so.0(ped_assert+0x2a) [0xdfca5a]
Jan 25 17:23:59 ubuntu ubiquity: 13: /lib/libparted.so.0(+0x410af) [0xe340af]
Jan 25 17:23:59 ubuntu ubiquity: 12: /lib/libparted.so.0(+0x41d87) [0xe34d87]
Jan 25 17:23:59 ubuntu ubiquity: 11: /lib/libparted.so.0(+0x446e4) [0xe376e4]
Jan 25 17:23:59 ubuntu ubiquity: 10: /lib/libparted.so.0(+0xe111) [0xe01111]
Jan 25 17:23:59 ubuntu ubiquity: 9: /lib/libparted.so.0(ped_disk_add_partition+0x25b) [0xe0456b]
Jan 25 17:23:59 ubuntu ubiquity: 8: /lib/libparted.so.0(+0x43691) [0xe36691]
Jan 25 17:23:59 ubuntu ubiquity: 7: /lib/libparted.so.0(+0x43c9f) [0xe36c9f]
Jan 25 17:23:59 ubuntu ubiquity: 6: /lib/libparted.so.0(ped_disk_new+0x75) [0xe04a25]
Jan 25 17:23:59 ubuntu ubiquity: 5: parted_server() [0x804deb7]
Jan 25 17:23:59 ubuntu ubiquity: 4: parted_server() [0x8056267]
Jan 25 17:23:59 ubuntu ubiquity: 3: parted_server() [0x8056951]
Jan 25 17:23:59 ubuntu ubiquity: 2: /lib/libc.so.6(__libc_start_main+0xe7) [0x9e0ce7]
Jan 25 17:23:59 ubuntu ubiquity: 1: parted_server() [0x8049e41]