FA-75755 / Text diff and three-way merge / Member archive

Unified hunk parser: no-newline markers end the hunk body · case 05

Patches touching a last line without newline are reported 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
no-newline marker is not a body line	`{"error": "hunk 0 truncated"}`	`{"hunks": [[1, 1, 1, 1, 2]]}`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.