Looking at a recent pg_upgrade thread I happened to notice that the check for roles with a pg_ prefix only reports the error, not the roles it found. Other similar checks where the user is expected to alter the old cluster typically reports the found objects in a textfile. The attached adds reporting to make that class of checks consistent (the check for prepared transactions which also isn't reporting is different IMO as it doesn't expect ALTER commands).
As this check is only executed against the old cluster the patch removes the check when printing the error. -- Daniel Gustafsson https://vmware.com/
v1-0001-Report-incompatible-roles-in-pg_upgrade-checking.patch
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