mirror of https://github.com/Qiskit/qiskit.git
13 lines
655 B
YAML
13 lines
655 B
YAML
---
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upgrade_transpiler:
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- |
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The default value for the :func:`.generate_routing_passmanager` argument
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``seed_transpiler`` has changed from ``None`` to ``-1``. This was done
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because this flag was only used to configure the :class:`.VF2PostLayout`
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transpiler pass in the output, and for that pass in particular the
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randomization typically only hurts performance and is not desirable.
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If you were relying on the previous default value you can restore this
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behavior by explicitly setting the argument ``seed_transpiler=None``. If
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you were explicitly setting a seed value for this parameter there is no
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change in behavior.
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