Gap analysis — c0 in decision #295
scry-mcdc · library/core/src/iter/adapters/flatten.rs:523 · branch 2183
Status: GAP
What you need
To prove condition c0 independently affects the decision, you need a row where c0 = T and the outcome differs from row 840 (where c0 = F).
Required condition vector:
c0 = T c1 = *
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_d295_c0() {
// Verdict: scry-mcdc
// Source: library/core/src/iter/adapters/flatten.rs:523
// Branch: 2183
//
// 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#295/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.