QA output created by 182
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432
Starting QEMU

Starting a second QEMU using the same image should fail
QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,id=drive0,file.locking=on: Failed to get "write" lock
Is another process using the image [TEST_DIR/t.qcow2]?

=== Testing reopen ===

{"return": {}}
{"return": {}}
Formatting 'TEST_DIR/t.qcow2.overlay', fmt=qcow2 size=197120 backing_file=TEST_DIR/t.qcow2 backing_fmt=file cluster_size=65536 lazy_refcounts=off refcount_bits=16
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}

=== Testing failure to loosen restrictions ===

{"return": {}}
{"return": {}}
{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false, "reason": "host-qmp-quit"}}
*** done