zpool upgrade - Assertion failed: ... libzfs/common/libzfs_config.c, line 250

[Mark Martinec]

Upgraded a fairly recent 10-STABLE to yesterday's version on two hosts
(amd64). Upgrade went fine, things work, but checking for ZFS pool
upgrades on one host fails, while the other is fine:


# zpool upgrade
This system supports ZFS pool feature flags.

All pools are formatted using feature flags.


Some supported features are not enabled on the following pools. Once a
feature is enabled the pool may become incompatible with software
that does not support the feature. See zpool-features(7) for details.

POOL  FEATURE
---------------
big
       large_blocks
Assertion failed: (nvlist_lookup_nvlist(config, "feature_stats", 
&features) == 0), file 
/usr/src/cddl/lib/libzfs/../../../cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c, 
line 250.
Abort trap


   Mark