diff -r 5a4fb5930126 -r 47efcb3433a7 usr/src/uts/common/fs/zfs/dsl_dataset.c
--- a/usr/src/uts/common/fs/zfs/dsl_dataset.c	Thu Jun 15 14:36:00 2006 -0700
+++ b/usr/src/uts/common/fs/zfs/dsl_dataset.c	Thu Jun 15 15:15:46 2006 -0700
@@ -1250,6 +1250,7 @@
 		VERIFY(0 == dsl_dataset_open_obj(dp,
 		    ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL,
 		    DS_MODE_NONE, FTAG, &ds_head));
+		VERIFY(0 == dsl_dataset_get_snapname(ds));
 #ifdef ZFS_DEBUG
 		{
 			uint64_t val;