Environment

• Qiskit version: 1.3.0 (compiled from source)
• Python version: 3.11.6
• Operating system: Ubuntu 23.01 LTS

Benny and I found this bug.

What is happening?

Passing circuit through transpiler with Hoare optimizer then running it causes qiskit.dagcircuit.exceptions.DAGCircuitError.

How can we reproduce the issue?

from qiskit import QuantumCircuit
from qiskit.transpiler import PassManager
from qiskit.transpiler.passes import HoareOptimizer

main_circ = QuantumCircuit(4)
main_circ.u(-0.273000,0.121000,0.659000, 2)
main_circ.cy(2,3)
main_circ.cy(2,3)
main_circ.cy(2,1)
main_circ.s(1)
main_circ.cy(1,3)
main_circ.h(1)
main_circ.cy(1,0)
main_circ.s(1)
main_circ.u(0.223000,0.989000,0.989000, 1)
main_circ.s(1)
main_circ.u(-0.120000,-0.509000,0.356000, 1)
main_circ.h(1)

print(main_circ)

pm = PassManager(HoareOptimizer())
pass_circ = pm.run(main_circ)

What should happen?

Circuit should run normally. This may have been introduced from commits made that aren't in 1.2.1. Just wanted to let you know about it before your next release even though we understand that this isn't the version that most users will be using.

Any suggestions?

No response