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Info: Ubuntu Livecd 15.10.
The Screen where it's stuck at:
It happens to me all the time.
To solve this, I format concerned linux partitions ( Filesystem Partition 5 and Swap partition 6 in your case) from disk utility ie gnome-disks manually.
Filesystem Partition 5
Swap partition 6
To do so you must select Try ubuntu instead of Install ubuntu after booting from bootable cd/usb.
Required, but never shown