Qemu on amd64 does not boot installation CDs

[Venkatesh Srinivas]

- Some programs dump core from time to time (uptime dependant)
  This evening, this is the turn of dosbox. It fails with this message:
    assertion: z->z_Magic == ZALLOC_SLAB_MAGIC in _slabfreeHi,Are you running the latest version of world, in addition to a recent kernel? If so, could you file a bug with the core of DOSBox? There were a number of bugs in nmalloc that have been addressed recently, I'd like to know if there are more... 

Thanks,-- vs