64-bit filesystem support is not enabled.  The larger fields afforded by this feature enable full-strength checksumming.  Pass -O 64bit to rectify.
Creating filesystem with 524288 1k blocks and 32768 inodes
Superblock backups stored on blocks: 
	8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409

Allocating group tables:      done                            
Writing inode tables:      done                            
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information:      done

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
test_filesys: 11/32768 files (0.0% non-contiguous), 27050/524288 blocks
Exit status is 0
Journal features:         (none)
debugfs write journal
Journal features:         journal_checksum_v3
debugfs: logdump -c
Journal starts at block 1, transaction 1
Found expected sequence 1, type 1 (descriptor block) at block 1
Found expected sequence 1, type 1 (descriptor block) at block 64
Found expected sequence 1, type 1 (descriptor block) at block 127
Found expected sequence 1, type 1 (descriptor block) at block 190
Found expected sequence 1, type 1 (descriptor block) at block 253
Found expected sequence 1, type 1 (descriptor block) at block 316
Found expected sequence 1, type 1 (descriptor block) at block 379
Found expected sequence 1, type 1 (descriptor block) at block 442
Found expected sequence 1, type 1 (descriptor block) at block 505
Found expected sequence 1, type 1 (descriptor block) at block 568
Found expected sequence 1, type 1 (descriptor block) at block 631
Found expected sequence 1, type 1 (descriptor block) at block 694
Found expected sequence 1, type 1 (descriptor block) at block 757
Found expected sequence 1, type 1 (descriptor block) at block 820
Found expected sequence 1, type 1 (descriptor block) at block 883
Found expected sequence 1, type 1 (descriptor block) at block 946
Found expected sequence 1, type 1 (descriptor block) at block 1009
Found expected sequence 1, type 1 (descriptor block) at block 1072
Found expected sequence 1, type 1 (descriptor block) at block 1135
Found expected sequence 1, type 1 (descriptor block) at block 1198
Found expected sequence 1, type 1 (descriptor block) at block 1261
Found expected sequence 1, type 1 (descriptor block) at block 1324
Found expected sequence 1, type 1 (descriptor block) at block 1387
Found expected sequence 1, type 1 (descriptor block) at block 1450
Found expected sequence 1, type 1 (descriptor block) at block 1513
Found expected sequence 1, type 1 (descriptor block) at block 1576
Found expected sequence 1, type 1 (descriptor block) at block 1639
Found expected sequence 1, type 1 (descriptor block) at block 1702
Found expected sequence 1, type 1 (descriptor block) at block 1765
Found expected sequence 1, type 1 (descriptor block) at block 1828
Found expected sequence 1, type 1 (descriptor block) at block 1891
Found expected sequence 1, type 1 (descriptor block) at block 1954
Found expected sequence 1, type 1 (descriptor block) at block 2017
Found expected sequence 1, type 1 (descriptor block) at block 2080
Found expected sequence 1, type 1 (descriptor block) at block 2143
Found expected sequence 1, type 1 (descriptor block) at block 2206
Found expected sequence 1, type 1 (descriptor block) at block 2269
Found expected sequence 1, type 1 (descriptor block) at block 2332
Found expected sequence 1, type 1 (descriptor block) at block 2395
Found expected sequence 1, type 1 (descriptor block) at block 2458
Found expected sequence 1, type 1 (descriptor block) at block 2521
Found expected sequence 1, type 1 (descriptor block) at block 2584
Found expected sequence 1, type 1 (descriptor block) at block 2647
Found expected sequence 1, type 1 (descriptor block) at block 2710
Found expected sequence 1, type 1 (descriptor block) at block 2773
Found expected sequence 1, type 1 (descriptor block) at block 2836
Found expected sequence 1, type 1 (descriptor block) at block 2899
Found expected sequence 1, type 1 (descriptor block) at block 2962
Found expected sequence 1, type 1 (descriptor block) at block 3025
Found expected sequence 1, type 1 (descriptor block) at block 3088
Found expected sequence 1, type 1 (descriptor block) at block 3151
Found expected sequence 1, type 1 (descriptor block) at block 3214
Found expected sequence 1, type 1 (descriptor block) at block 3277
Found expected sequence 1, type 1 (descriptor block) at block 3340
Found expected sequence 1, type 1 (descriptor block) at block 3403
Found expected sequence 1, type 1 (descriptor block) at block 3466
Found expected sequence 1, type 1 (descriptor block) at block 3529
Found expected sequence 1, type 1 (descriptor block) at block 3592
Found expected sequence 1, type 1 (descriptor block) at block 3655
Found expected sequence 1, type 1 (descriptor block) at block 3718
Found expected sequence 1, type 1 (descriptor block) at block 3781
Found expected sequence 1, type 1 (descriptor block) at block 3844
Found expected sequence 1, type 1 (descriptor block) at block 3907
Found expected sequence 1, type 1 (descriptor block) at block 3970
Found expected sequence 1, type 1 (descriptor block) at block 4033
Found expected sequence 1, type 1 (descriptor block) at block 4096
Found expected sequence 1, type 1 (descriptor block) at block 4159
Found expected sequence 1, type 2 (commit block) at block 4165
No magic number at block 4166: end of journal.
test_filesys: recovering journal
Superblock has an invalid journal (inode 8).
Clear? yes

*** journal has been deleted ***

Resize inode not valid.  Recreate? yes

Pass 1: Checking inodes, blocks, and sizes
Root inode is not a directory.  Clear? yes

Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Root inode not allocated.  Allocate? yes

/lost+found not found.  Create? yes

Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences:  +(1--260) +276 +(292--419) +2342 -(139265--155648)
Fix? yes

Free blocks count wrong for group #0 (5837, counted=5850).
Fix? yes

Free blocks count wrong for group #17 (0, counted=8192).
Fix? yes

Free blocks count wrong for group #18 (0, counted=8192).
Fix? yes

Free blocks count wrong (497236, counted=513633).
Fix? yes

Inode bitmap differences:  +1 +(3--10)
Fix? yes

Free inodes count wrong for group #0 (500, counted=501).
Fix? yes

Directories count wrong for group #0 (3, counted=2).
Fix? yes

Free inodes count wrong (32756, counted=32757).
Fix? yes

Recreate journal? yes

Creating journal (16384 blocks):  Done.

*** journal has been regenerated ***

test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
test_filesys: 11/32768 files (0.0% non-contiguous), 27039/524288 blocks
Exit status is 1