qpy serialization fails with faulty qubits

[AzizNgoueya]

Describe the bug
Today when submitting a job on ibm_osaka using backend.run() produces the following error:
File "/usr/local/lib/python3.10/dist-packages/qiskit_ibm_provider/qpy/binary_io/circuits.py", line 917, in _write_layout
virtual_bit = final_layout_physical[i]
KeyError: 16

Steps to reproduce

service = QiskitRuntimeService()    
backend = service.get_backend('ibm_osaka')
qcT = transpile(qc, backend=backend)
job =  backend.run(qcT,shots=1000)

Expected behavior
Should works

Suggested solutions
The backend reports two faulty qubits on osaka today, backend.properties().faulty_qubits() : [16, 106] and they are missing in the physical layout. I added an exception here https://github.com/Qiskit/qiskit-ibm-provider/blob/f537ad7ece1d325e496fcce29712d50605b5080e/qiskit_ibm_provider/qpy/binary_io/circuits.py#L963

for i in range(circuit.num_qubits):
            try:
                virtual_bit = final_layout_physical[i]
                final_layout_array.append(circuit.find_bit(virtual_bit).index)
            except KeyError:
                continue

Additional Information

• qiskit-ibm-runtime version: 0.18.0
• qiskit-ibm-provider version: 0.8.0
• Python version: 3.8.18
• Operating system: macos

[kt474]

Hi @AzizNgoueya, the changes in #1377 removed the qpy module from our codebase. If you are still having this issue with the latest version (> 0.19.0), the qpy issue would be fixed in https://github.com/Qiskit/qiskit.

[AzizNgoueya]

Hi @kt474, I am still having the issue with the latest version of qiskit-ibm-runtime but we will wait for the qiskit 1.0.0 release, Thanks.

[AzizNgoueya]

Closing this issue since it works with qiskit 1.0.0