FA-48448 / Delimited text / Member archive

A text checksum is calculated from UTF-8 bytes instead of code points · case 03

A structured table violates the declared record or column contract.

Member previewVariant 3 · 3 implementations · 10 checks per implementation

Case contract

Decode rows encoded as comma cells followed by |decimal check. The check is the sum of Unicode code points in the exact comma payload modulo 97; this is only a corruption-detection toy, not cryptographic integrity. Use the last pipe as trailer separator, permitting pipes in cells. Reject malformed or mismatched checks. Return fields.

Why this case matters

Delimited interchange needs explicit framing, schema and field semantics at ingestion and emission boundaries.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
unicode	`null`	`["\u00e9"]`	Failed

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