Gap analysis — c2 in decision #224
scry-mcdc · library/core/src/mem/maybe_uninit.rs:574 · branch 1793
Status: GAP
What you need
To prove condition c2 independently affects the decision, you need a row where c2 = F and the outcome differs from row 688 (where c2 = T).
Required condition vector:
c0 = F c1 = F c2 = F c3 = *
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_d224_c2() {
// Verdict: scry-mcdc
// Source: library/core/src/mem/maybe_uninit.rs:574
// Branch: 1793
//
// TODO: drive the function so condition c2 evaluates to the
// value above and the resulting decision outcome differs from
// the existing pair row.
todo!("witness viz: gap drill-down for d#224/c2");
}
After adding the test, re-run: witness instrument && witness run --invoke run_row_NEW && witness report. The condition should flip from gap to proved.