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> I just found out that dyndb tests (git/bin/tests/system/dyndb) are failing on
> latest master. git bisect pointed me to following change:

Yep, thanks, we just discovered the same problem here last week.

It's the same class of problem we had back while we were developing
it: inconsistent namespace resolution for global variables referenced
inside the dyndb driver.  It all works fine on ubuntu, but it's failing
on your system (which I guess is redhat?), and also on BSD.

We fixed it in the original dyndb work by passing a pointer to named's
hash context (isc_hashctx) to the dyndb driver, so that hashes would be
consistent.  But the new hash function introduced a while ago deprecates
the hash context, and so hashes started coming out differently inside and
outside of the driver, causing RBT lookups to fail.  A fix is attached,
can you try it?

I'm also looking into an intermittent reference leak that seems to
happen sometimes when a dyndb driver is reloaded. That one's making
slower progress.