qiskit-aer
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Aborted (core dumped) QASM simulator error for extremely high depth circuits with rz gates
Environment
-
Qiskit Terra version:
qiskit-terra==0.25.0
-
Python version:
Python 3.9.12
- Operating system: Linux
What is happening?
For some extremely large (high depth, high gate count) circuits, the local QASM simulator (qasm_simulator
) occasionally encounters a core dump:
terminate called after throwing an instance of 'std::invalid_argument'
what(): QubitUnitary::State::invalid instruction 'rz'.
Aborted (core dumped)
How can we reproduce the issue?
I encountered this on a 16 qubit circuit that was extremely high depth - it contained upwards of 38000 rz gates, 16000 rx gates, and 32000 cx gates.
Oddly, it appears that the error disappears if I compile the circuit to not use any rz gates. Although, I think that the error also only occurs sometimes - I can not deterministically replicate it so far.
What should happen?
No error. No core dump.
Any suggestions?
No response
I think this a bug in qiskit-aer
the exception being raised is at least coming from qiskit-aer and qasm-simulator
is definitely part of aer. I'm going to transfer this issue to the aer repo.
This error is raised in gate fusion. An workaround is set fusion_enable=False
.
@epelofske-LANL Could you share your codes that reproduce this issue? I would like to take a look.