As far as I remember pg_upgrade is from 11.2 rest is from 9.5. This is due to the fact, that the version is secured, only md5, md5 hashed and so on. I compared the code and didn’t see much difference in pg_upgrade core, but give me some days and I will test it using binaries from 11.2
Regards
Thomas
W dniu pon., 18.03.2019 o 23:37 Tom Lane <tgl@sss.pgh.pa.us> napisał(a):
I was hoping you'd tell me ;-). If it's not false in the old cluster, though, that theory is all wet.
I wonder if you're somehow using the wrong version of pg_upgrade or pg_dump. There are cross-checks about that in pg_upgrade, but it looks like they only check the major version number --- if we'd changed anything about this in a minor release (which I think we did), it might be possible to get burnt if you were using pg_upgrade or pg_dump from a prior minor release. What are all the versions involved, exactly?