DynFlags is reboxed in $wwarnAboutOverflowedOverLit
GHC decides it would be a good idea to unbox/rebox DynFlags
in GHC.HsToCore.Match.Literal.warnAboutOverflowedLit
. I think this leads to a hotspot in the ticky profile.
https://gist.github.com/b3ac9740e14d08b8fb3852fd9670946d
cc @sgraf812