collation-generation: Avoid using `para_backing_state` if runtime is ancient (#4070)
fixes https://github.com/paritytech/polkadot-sdk/issues/4067
Also add an early bail out for look ahead collator such that we don't
waste time if a CollatorFn is not set.
TODO:
- [x] add test.
- [x] Polkadot System Parachain burn-in.
---------
Signed-off-by:
Andrei Sandu <andrei-mihail@parity.io>
parent
69cc7f20
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- polkadot/node/collation-generation/src/lib.rs 47 additions, 26 deletionspolkadot/node/collation-generation/src/lib.rs
- polkadot/node/collation-generation/src/tests.rs 77 additions, 13 deletionspolkadot/node/collation-generation/src/tests.rs
- prdoc/pr_4070.prdoc 12 additions, 0 deletionsprdoc/pr_4070.prdoc
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