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The next version (7.10) of GHC is slated to have a drastically changed Prelude,
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driven by the (aptly) named Burning Bridges Proposal (BBP), ticket [9586](https://gitlab.haskell.org//ghc/ghc/issues/9586). This proposal generalises
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many list operations, e.g. foldr, so they are overloaded - typically becoming members of
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either Foldable or Traversable. A complete list pf changes is given at the foot of this page.
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either Foldable or Traversable. A complete list pf changes is given at the foot of this page. Gershom has made [ a wiki page that describes the change in more detail](https://wiki.haskell.org/Foldable_Traversable_In_Prelude).
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This message comes very late in the release process, but we would urge caution before changing.
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