ext2fs_open2: The ext2 superblock is corrupt
../e2fsck/e2fsck: Superblock invalid, trying backup blocks...
../e2fsck/e2fsck: The ext2 superblock is corrupt while trying to open test.img
../e2fsck/e2fsck: Trying to load superblock despite errors...
First_meta_bg is too big.  (2, max value 1).  Clear? yes

Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences:  -3
Fix? yes

Free blocks count wrong for group #0 (79, counted=80).
Fix? yes

Free blocks count wrong (79, counted=80).
Fix? yes


test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 11/16 files (0.0% non-contiguous), 20/100 blocks
Exit status is 1