Re: BUG #15896: pg_upgrade from 10-or-earlier: TRAP: FailedAssertion(»!(metad->btm_version >= 3)«

Re: Peter Geoghegan 2019-07-06 <CAH2-WznYXDG6aANoag5ixoMrV=0bD-W5i9cVq4cRkb-fA4xRmw@mail.gmail.com>
> > When pg_upgrading from 10-or-earlier to 12beta2 or 13devel, an assertion is
> > raised. (Spotted by Debian's postgresql-common upgrade tests. Previously
> > missed because we were only testing version+1 upgrades.)
> 
> Obviously you were right to adopt pg_upgrade tests that cross more
> than one version at a time. Thanks!

Indeed, and running 9.6->10->11 tests (that were present before as
well, but never run) revealed another bug in pg_upgradecluster
itself... Testsuites are just awesome.

Christoph