Specifying the I<--convert> option is usually a good idea, because
then virt-sparsify doesn't need to try to guess the input format.
+=item B<--debug-gc>
+
+Debug garbage collection and memory allocation. This is only useful
+when debugging memory problems in virt-sparsify or the OCaml libguestfs
+bindings.
+
=item B<--format> raw
=item B<--format> qcow2