GroverOperator doesn't work properly in 'ibmq_qasm_simulator'

[KetpuntoG]

When running the Grover operator in the simulator we get the following error:

dev = qml.device('qiskit.ibmq', wires=6, backend='ibmq_qasm_simulator')

@qml.qnode(dev)
def circuit():
    
    qml.GroverOperator(wires = range(6))
    
    return qml.probs(wires = range(6))

circuit()

WireError: Did not find some of the wires <Wires = [3, 5, None]> on device with wires <Wires = [0, 1, 2, 3, 4, 5]>.

In default.qubit it works correctly.

Tested with version 0.32

[trbromley]

Thanks @KetpuntoG! We should definitely get this fixed. Is it blocking any work you are doing now?

[albi3ro]

PennyLaneAI/pennylane#4668

Fixes so the error is now:

ValueError: At least one work wire is required to decompose operation: MultiControlledX

So still an error, but an error that informs the user how to not get the error.

[KetpuntoG]

It is not blocking me @trbromley
But that error is not something that the user can't solve right? @albi3ro

[albi3ro]

@KetpuntoG

GroverOperator(wires(0,1,2,3), work_wires="aux")