passmanager fails when called a second time on different circuit

[Paul Nation]

Environment

• Qiskit version: 1.0.2
• Python version:
• Operating system:

What is happening?

N = 14

qc = QuantumCircuit(N)
qc.h(0)
qc.cx(0, range(1,N))
qc.measure_all()

eagle_pm = generate_preset_pass_manager(3, backend=eagle_backend)
trans_qc = eagle_pm.run(qc)

qc2 = QuantumCircuit(N)
qc2.h(N//2)
qc2.cx(range(N//2, 0, -1), range(N//2-1, -1, -1))
qc2.cx(range(N//2, N-1), range(N//2+1, N))
qc2.measure_all()

trans_qc2 = eagle_pm.run(qc2)

fails on the second call with

TranspilerError: "The 'layout' must be full (with ancilla)."

If I make a new PM instance it works, so I am assuming there is some state being held.

How can we reproduce the issue?

run above

What should happen?

it should work

Any suggestions?

No response

[Jake Lishman]

Are you sure you're using Qiskit 1.0.2? I can't reproduce with 1.0.2 nor current main, and I think I already fixed this issue after you raised it before: #11784, #11787.

For what it's worth, here's my complete reproducer script, guessing at your undefined variables, in case they're material:

from qiskit import QuantumCircuit
from qiskit.transpiler.preset_passmanagers import generate_preset_pass_manager
from qiskit_ibm_runtime import QiskitRuntimeService

prov = QiskitRuntimeService()
eagle_backend = prov.get_backend("ibm_sherbrooke")

N = 14

qc = QuantumCircuit(N)
qc.h(0)
qc.cx(0, range(1,N))
qc.measure_all()

eagle_pm = generate_preset_pass_manager(3, backend=eagle_backend)
trans_qc = eagle_pm.run(qc)

qc2 = QuantumCircuit(N)
qc2.h(N//2)
qc2.cx(range(N//2, 0, -1), range(N//2-1, -1, -1))
qc2.cx(range(N//2, N-1), range(N//2+1, N))
qc2.measure_all()

trans_qc2 = eagle_pm.run(qc2)

[Paul Nation]

Ahh no your right. The AI transpiler install downgraded me to 1.0.0. Thanks!