FA-46129 / Bounded deques / Member archive

Weighted deque omits zero-weight entries from its release stream · case 04

Weighted deque omits zero-weight entries from its release stream.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Deque entries have nonnegative weights. Evict the shortest oldest prefix sufficient to satisfy the weight budget; preserve zero-weight entries unless preceding a required eviction. Return survivors, releases, weight and free budget.

Why this case matters

Controlled bounded deque implementation model with explicit storage and lifecycle observations.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
zero weights	`[[[6, 0]], [[5, 4]], 0, 0]`	`[[[6, 0]], [[4, 0], [5, 4]], 0, 0]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.