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Beam search: duplicate token paths occupy multiple beam slots · case 03
duplicate token paths occupy multiple beam slots.
Case contract
Rows [token_tuple,score]; return one row per sequence with its highest score, ordered by score descending then sequence.
Why this case matters
Beam decoders rely on consistent hypothesis state while expanding and ranking candidates.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| best duplicate score | [[["a"], -1], [["b"], -2], [["a"], -3]] | [[["a"], -1], [["b"], -2]] | Failed |
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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
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