6723703 zpool upgrade -> assertion failed: ds->ds_phys->ds_prev_snap_obj != 0 || ...

[matthew.ahr...@sun.com]

Author: ahrens
Repository: /hg/onnv/onnv-gate
Latest revision: 524fec1acf1c4b791106eb022661d6394e8234a1
Total changesets: 1
Log message:
6723703 zpool upgrade -> assertion failed: ds->ds_phys->ds_prev_snap_obj != 0 
|| ...

Files:
        update: usr/src/uts/common/fs/zfs/dsl_dataset.c