QA output created by 043
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 

== backing file references self ==
qemu-img: Backing file 'TEST_DIR/t.IMGFMT' creates an infinite loop.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.base' 

== parent references self ==
qemu-img: Backing file 'TEST_DIR/t.IMGFMT' creates an infinite loop.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.1.base' 
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.2.base' 
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.3.base' 

== ancestor references another ancestor ==
qemu-img: Backing file 'TEST_DIR/t.IMGFMT.2.base' creates an infinite loop.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.1.base' 
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.2.base' 

== finite chain of length 3 (human) ==
image: TEST_DIR/t.IMGFMT
file format: IMGFMT
virtual size: 128M (134217728 bytes)
cluster_size: 65536
backing file: TEST_DIR/t.IMGFMT.2.base

image: TEST_DIR/t.IMGFMT.2.base
file format: IMGFMT
virtual size: 128M (134217728 bytes)
cluster_size: 65536
backing file: TEST_DIR/t.IMGFMT.1.base

image: TEST_DIR/t.IMGFMT.1.base
file format: IMGFMT
virtual size: 128M (134217728 bytes)
cluster_size: 65536

== finite chain of length 3 (json) ==
[
    {
        "virtual-size": 134217728, 
        "filename": "TEST_DIR/t.IMGFMT", 
        "cluster-size": 65536, 
        "format": "IMGFMT", 
        "backing-filename": "TEST_DIR/t.IMGFMT.2.base", 
        "dirty-flag": false
    }, 
    {
        "virtual-size": 134217728, 
        "filename": "TEST_DIR/t.IMGFMT.2.base", 
        "cluster-size": 65536, 
        "format": "IMGFMT", 
        "backing-filename": "TEST_DIR/t.IMGFMT.1.base", 
        "dirty-flag": false
    }, 
    {
        "virtual-size": 134217728, 
        "filename": "TEST_DIR/t.IMGFMT.1.base", 
        "cluster-size": 65536, 
        "format": "IMGFMT", 
        "dirty-flag": false
    }
]
*** done