qiskit/releasenotes/notes/1.2/fix-potential-non-determini...

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---
fixes:
- |
Fixed a potential source of non-determinism in :class:`~.DenseLayout` (and
by extension :class:`~.SabreLayout`) when targeting a
:class:`.CouplingMap` or :class:`.Target` that has more than one subgraph
with the same degree of connectivity. In these case the exact output
layout from the pass could previously fluctuate based on the number of
local CPUs and thread execution speed.