I recently upgraded two systems from 9.2 to 10.1. Now, on both systems, I always get a core dump when doing 'zpool import'. One is a raidz2 pool of 6 devices. The other is just a plain pool created from one device. Other than the coredump, the systems & import seem to be fine.
Doesn't seem to be related to autofs.
You are right. Sorry, I was detracted by the autofs-related bug I filed.
This does not seem to occur any more on 11.0.