Gap analysis — c0 in decision #38
scry-mcdc · library/alloc/src/collections/btree/node.rs:1262 · branch 216
Status: GAP
What you need
To prove condition c0 independently affects the decision, you need a row where c0 = F and the outcome differs from row 29377 (where c0 = T).
Required condition vector:
c0 = F c1 = T
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_d38_c0() {
// Verdict: scry-mcdc
// Source: library/alloc/src/collections/btree/node.rs:1262
// Branch: 216
//
// TODO: drive the function so condition c0 evaluates to the
// value above and the resulting decision outcome differs from
// the existing pair row.
todo!("witness viz: gap drill-down for d#38/c0");
}
After adding the test, re-run: witness instrument && witness run --invoke run_row_NEW && witness report. The condition should flip from gap to proved.