QA output created by 133
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base

=== Check that node-name can't be changed ===

Cannot change the option 'node-name'
Cannot change the option 'node-name'
Cannot change the option 'node-name'

=== Check that unchanged node-name is okay ===


=== Check that driver can't be changed ===

Cannot change the option 'driver'
Cannot change the option 'driver'
Cannot change the option 'driver'

=== Check that unchanged driver is okay ===


=== Check that reopening works with non-string options ===

format name: null-co
format name: null-co
*** done