Todd Gamblin afc99ca516 Remove single-root assertion from Spec.root ... - Assertion would search for root through all possible paths. - It's also really slow. - This isn't needed anymore. We're pretty good at ensuring single-rooted DAGs, and this assertion has never been thrown. - This shaves another 6 seconds off r-rminer concretization		2017-10-13 19:46:57 -07:00
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spack	Remove single-root assertion from Spec.root	2017-10-13 19:46:57 -07:00