QA output created by 305
### Create the image
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
### Fill the first refcount block and one data cluster from the second
wrote 126976/126976 bytes at offset 0
124 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
### Discard two of the last data clusters, leave one in the middle
discard 1024/1024 bytes at offset 123904
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
discard 1024/1024 bytes at offset 125952
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
### Corrupt the offset of the second refcount block
### Try to allocate the discarded clusters again
qcow2: Marking image as corrupt: Refblock offset 0x20600 unaligned (reftable index: 0x1); further corruption events will be suppressed
write failed: Input/output error
*** done