FA-11575 / Filesystem semantics / Member archive

Sparse holes disappear when file bytes are reconstructed · case 05

Sparse holes disappear when file bytes are reconstructed.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Deterministic in-memory filesystem model. Logical file has nonnegative size and a map from allocated integer offsets to byte values 0..255. Return all logical bytes as a list; offsets outside size are ignored.

Why this case matters

An offline semantic experiment for file API clients; it models only the stated operations, not a complete operating system.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
leading hole	`[65]`	`[0, 0, 0, 0, 0, 65]`	Failed

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

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