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Update specs/core/0_beacon-chain.md 

Co-Authored-By: vbuterin <v@buterin.com>
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Danny Ryan 2018-12-21 17:22:42 -05:00 committed by GitHub
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specs/core/0_beacon-chain.md
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@ -1749,7 +1749,7 @@ Also perform the following updates:
If a validator registry update does _not_ happen do the following:
* Set `state.shard_committees_at_slots[:EPOCH_LENGTH] = state.shard_committees_at_slots[EPOCH_LENGTH:]`.
* Let `epochs_since_finality = (state.slot - state.validator_registry_latest_change_slot) // EPOCH_LENGTH`.
* Let `epochs_since_lastest_registry_change = (state.slot - state.validator_registry_latest_change_slot) // EPOCH_LENGTH`.
* Let `start_shard = state.shard_committees_at_slots[0][0].shard`.
* If `epochs_since_finality` is an exact power of 2, set `state.shard_committees_at_slots[EPOCH_LENGTH:] = get_new_shuffling(state.latest_randao_mixes[(state.slot - EPOCH_LENGTH) % LATEST_RANDAO_MIXES_LENGTH], state.validator_registry, start_shard)`. Note that `start_shard` is not changed from the last epoch.