Gap analysis — c4 in decision #280
scry-mcdc · lib.rs:3167 · branch 1721
Status: GAP
What you need
To prove condition c4 independently affects the decision, you need a row where c4 = F and the outcome differs from row 47305 (where c4 = T).
Required condition vector:
c0 = F c1 = F c2 = F c3 = F c4 = F
Conditions marked * were short-circuited in the baseline row; the new test must drive inputs so they get evaluated to either T or F.
Suggested test stub
#[test]
fn closes_gap_d280_c4() {
// Verdict: scry-mcdc
// Source: lib.rs:3167
// Branch: 1721
//
// TODO: drive the function so condition c4 evaluates to the
// value above and the resulting decision outcome differs from
// the existing pair row.
todo!("witness viz: gap drill-down for d#280/c4");
}
After adding the test, re-run: witness instrument && witness run --invoke run_row_NEW && witness report. The condition should flip from gap to proved.