Where to email regarding 4.9RC1 bugs/problems?

[twig les]

Hey all, I'm having stability problems after updating my laptop
from 4.7 to 4.9RC1 and I'd like to know where I can send the
relevant info.  I've scoured the site and still can't find any
specific place.  None of the lists available jumped out at me as
obvious.  What did I miss?

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