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Transpilation Failure at Optimization Level 3
Environment
- Qiskit version: 1.0.2
- Python version: 3.10.9
- Operating system: MacOS 14.4
What is happening?
qiskit.transpile
with optimization_level=3
fails to transpile this circuit:
circ = qiskit.QuantumCircuit(3, 1)
circ.swap(1, 2)
circ.measure(1, 0)
circ.measure(0, 0)
How can we reproduce the issue?
To reproduce the issue, execute the following code:
import qiskit
circ = qiskit.QuantumCircuit(3, 1)
circ.swap(1, 2)
circ.measure(1, 0)
circ.measure(0, 0)
print(qiskit.transpile(circ, optimization_level=3))
Running this code results in ValueError
:
File "qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py", line 65, in run
new_measure_qarg = swap_qargs[swap_qargs.index(old_measure_qarg) - 1]
ValueError: tuple.index(x): x not in tuple
What should happen?
The circuit should be transpiled without any errors.
Any suggestions?
No response