Update specs/core/1_shard-data-chains.md

Co-Authored-By: Hsiao-Wei Wang <hwwang156@gmail.com>
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vbuterin 2019-08-02 09:40:26 -04:00 committed by GitHub
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@ -432,7 +432,7 @@ def shard_slot_transition(state: ShardState, beacon_state: BeaconState) -> None:
# Save states in history accumulator
depth = 0
h = hash_tree_root(state)
while state.slot % 2**depth == 0:
while state.slot % 2**depth == 0 and depth <= HISTORY_ACCUMULATOR_VECTOR:
state.history_accumulator[depth] = h
depth += 1