FA-47399 / Delimited text / Member archive

One TSV escape captures the following ordinary character · case 04

A structured table violates the declared record or column contract.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Decode TSV fields with exactly four escapes: backslash-t, backslash-n, backslash-r, backslash-backslash. Raw tabs split fields, raw newlines are forbidden; unknown and dangling escapes reject the row. Empty input is one empty field.

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
mapped escapes	`null`	`["cellcellcellcell\tA\nB\rC\\D"]`	Failed

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