Comment 3 for bug 1232264

I can reproduce here.

I created in Gparted:
    Partition Table in MBR (msdos), NON-EFI system
    /dev/sda1 -- 1024 MiB EXT4
    /dev/sda2 -- 20 GiB Btrfs
    /dev/sda3 -- Btrfs
    /dev/sda4 -- 4 GiB linux-swap

And then i tried to install by "Something Else" option:

1. Double click in sda1 partition, Use as: "Ext4 journaling file system", Mount Partition: /boot, check Format option, and click OK
2. Double click in sda2 partition, Use as: "Btrfs journaling file system", Mount Partition: /, check Format option, and click OK
3. Double click in sda3 partition, Use as: "Btrfs journaling file system", Mount Partition: /home, check Format option, and click OK
4. Click in Continue
5. Get an error: "The file system creation in partition #2 of SCSI5 (0,0,0) (sdg) failed."

So, take a look, the erro was in #2, which use Btrfs.

If I change to "Ext4 journaling file system" and check Format option, it installs the system.