FA-48753 / Delimited text / Member archive

Cell patches use character-zero as every source start · case 03

A structured table violates the declared record or column contract.

Member previewVariant 3 · 3 implementations · 9 checks per implementation

Case contract

Apply cell text edits to an unquoted comma row without changing unedited spelling. Edits are [zero-based cell index,replacement text], unique indexes only; replacements cannot contain comma or newline. Compute all source spans before editing and apply from right to left. Out-of-range indexes reject.

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
vary lengths	`"cellcellcelllong"`	`"cellcellcelllong,bbb,z"`	Failed

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