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The latest commit gives the following error on the README example. The previous commit works fine.
UnboundLocalError: local variable 'map_to_block' referenced before assignment.

Example code to reproduce:

from olsq import OLSQ
from olsq.device import qcdevice

qasm_in = "OPENQASM 2.0;\n include \"qelib1.inc\";\n qreg q[3];\n h q[2];\n cx q[1], q[2];\n tdg q[2];\n " \
          "cx q[0], q[2];\n t q[2];\n cx q[1], q[2];\n tdg q[2];\n cx q[0], q[2];\n t q[1];\n t q[2];\n " \
          "cx q[0], q[1];\n h q[2];\n t q[0];\n tdg q[1];\n cx q[0], q[1];\n"

lsqc_solver = OLSQ("depth", "normal")
lsqc_solver.setprogram(qasm_in)
lsqc_solver.setdevice(qcdevice("dev", 5, [(0, 1), (1, 2), (1, 3), (3, 4)], 3))

qasm_out = lsqc_solver.solve()

Also if I change mode to "transition" in the above, I get a different error:

line 263, in solve
    lsqc.add(sigma[k][t] == False)
IndexError: list index out of range

Hi,

I bumped into KEYERROR when trying out the Cirq interface. I think in the Cirq interface section in the README, setdevicegraph needs to be called before setprogram. Otherwise the mapping dictionary is empty and would trigger KEYERROR. I also have a question about the mapping. It seems like the qubits type in the input device graph and the input quantum circuit needs to be the same. Can I input a circuit in Cirq with cirq.devices.LineQubit and a coupling graph with cirq.devices.GridQubit for the solver?

Best,
Sitao