from qiskit import QuantumCircuit

# MissingReset via a 2-qubit gate: cx(0,1) is the first operation touching
# both q0 and q1, so both are used while uninitialised. Engine B must flag
# q0 and q1 (the cx is a gate, not a reset).
qc = QuantumCircuit(2, 2)
qc.cx(0, 1)        # BUG: cx uses q0 and q1 before any reset (MissingReset q0, q1)