QA output created by 200
Formatting 'TEST_DIR/backing.img', fmt=IMGFMT size=536870912
Formatting 'TEST_DIR/test.img', fmt=IMGFMT size=536870912 backing_file=TEST_DIR/backing.img backing_fmt=IMGFMT
wrote 314572800/314572800 bytes at offset 512
300 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

=== Starting QEMU VM ===

{"return": {}}

=== Sending stream/cancel, checking for SIGSEGV only ===

500 iterations performed
*** done