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Component effect lifecycle: Cleanup registration retained · case 05

Cleanup registration retained.

Member previewVariant 5 · 3 implementations · 60 checks per implementation

Case contract

An effect tracks dependency length, values and scalar types; an empty dependency vector differs from no prior run. Cleanup precedes setup, unmount suppresses completion writes, and each setup advances a generation. Operation cleanup-registration-retained has the six explicit input/output oracles below.

Why this case matters

An offline client lifecycle model that isolates a state-management defect without DOM rendering or network services.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
cleanup-registration-retained scenario 3	`true`	`false`	Failed

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