Hi Amit, I'm afraid v20-0001 fails to apply to the current HEAD (precisely, ftp.postgresql.org/pub/snapshot/dev/postgresql-snapshot.tar.gz). Could you check it?
I'm trying to reproduce what Imai-san hit with my patch. His environment is master@Jan/28 + v18 of your patches. When he added my patch there, CREATE TABLE crashed. On the other hand, the current master + my patch succeeds. So, I wanted to test with the current HEAD + v20 of your patch + my patch. Regards Takayuki Tsunakawa