Gap analysis — c0 in decision #1212
scry-mcdc · malloc.c:4398 · branch 8302
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 3334 (where c0 = T).
Required condition vector:
c0 = F c1 = * c2 = * c3 = F c4 = F c5 = T c6 = * c7 = * c8 = * c9 = * c10 = * c11 = * c12 = * c13 = *
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_d1212_c0() {
// Verdict: scry-mcdc
// Source: malloc.c:4398
// Branch: 8302
//
// 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#1212/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.