FA-75760 / Text diff and three-way merge / Member archive

Unified hunk parser: an empty line inside a hunk ends it · case 05

Patches whose blank context lines lost their leading space are rejected as truncated.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Parse "@@ -a[,b] +c[,d] @@" hunks (omitted counts are 1) and consume body lines until both remaining counts reach zero: " " (or a completely empty line) counts for both sides, "-" for old, "+" for new, "\\" marker lines are skipped and not counted, anything else ends the body. Remaining counts other than zero yield {"error": "hunk k truncated"}. Return [a, b, c, d, body_lines] per hunk.

Why this case matters

Patch tools must validate hunk bodies against their headers before applying anything.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
empty line tolerated as context	`{"error": "hunk 0 truncated"}`	`{"hunks": [[1, 3, 1, 3, 3]]}`	Failed

MEMBER ARCHIVE

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