Important Current versions of Polkadot/Substrate have dropped support for linked maps on storage entries. If you are using these queries to retrieve all entries, for instance staking.{nominators,validators}() and using an upgraded chain, you need to swap to retrieving entries via .entries() or .keys() for the keys.

Changes:

Pull in support and types for latest Polkadot/Substrate
Add support for the new Substrate state_getKeysPaged RPC, including use in storage keys
Move derive.staking.controllers to derive.staking.stashes, reflecting actual content
Cater for adjusted storage (non-linked mapped) for derive.staking.stashes queries (with old-compat)
Expanded derive.staking.* derives, including addition of derive.staking.own*
Re-add fixed (with tests) checks for query args, previously disabled in 1.6.2