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From: Kyle Evans <kevans@freebsd.org>
Date: Mon, 28 Jan 2019 22:10:25 -0600
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Subject: Re: svn commit: r343543 - head/sbin/bectl/tests
Cc: src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, 
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On Mon, Jan 28, 2019 at 10:09 PM Kyle Evans <kevans@freebsd.org> wrote:
>
> Author: kevans
> Date: Tue Jan 29 04:08:49 2019
> New Revision: 343543
> URL: https://svnweb.freebsd.org/changeset/base/343543
>
> Log:
>   bectl(8) test: Force destroy the zpool in cleanup
>
>   This is a wild guess as to why bectl tests failed once upon a time in CI,
>   given no apparent way to see a transcript of cleanup routines with Kyua. The
>   bectl tests construct a new, clean zpool for every test. The failure
>   indicated was because of a mount that was leftover from a previous test, but
>   the previous test had succeeded so it's not clear how the mount remained
>   leftover unless the `zpool get health ${pool}` had somehow failed.
>

I left out: the tests are supposed to be constructed to clean up any
mounts that were left over in the course of the test, hence the
assumption that the failure lies in the cleanup.