Bugfix - libvmi/events.c : Previously, the callback invoked by g_hash_table_foreach* modified the SS events hashtable (forbidden by glib API documentation and throwing an assert as a result). Fixed in vmi_shutdown_single_step by destroying the singlestep events hashtable (and recreating it to reproduce initial state). This is safe because driver_shutdown_single_step unconditionally disables singlestep on all VCPUs.