[ANNOUNCE] GHC 8.2.1 release candidate 2

Hello everyone, The GHC team is very pleased to announce the second candidate of the 8.2.1 release of the Glasgow Haskell Compiler. Source and binary distributions are available at https://downloads.haskell.org/~ghc/8.2.1-rc2/ This is the second of what will likely be either two or three release candidates leading up the final 8.2.1 release. This release will feature, * A new type-indexed Typeable implementation * The long awaited Backpack * Deriving strategies for disambiguating DeriveAnyClass, GeneralizedNewtypeDeriving, and stock mechanisms * Overloaded record fields * Improved compiler performance * Better code generation through more robust tracking of join points * Compact regions for more efficient garbage collection and serialization * Better support for machines with non-uniform memory architectures * More robust support for levity (e.g. RuntimeRep) polymorphism * A simple interface for streaming eventlog data from live processes * Further refinement of DWARF support This candidate fixes most of the issues present in release candidate one including, * #13233: typePrimRep panic while compiling GHC with profiling enabled * #13509: type error involving unboxed tuples * #13426: compile-time memory-usage regression * #13560: Windows binary distributions carry absolute paths to toolchain * #13585: Control.Lens.Wrapped.ala causes compiler panic * #13623: Join points produce bad code for stream fusion As always, please let us know if you have difficulty. Thanks to everyone who has contributed! Happy testing, - Ben -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 487 bytes Desc: not available URL: <http://mail.haskell.org/pipermail/ghc-devs/attachments/20170515/13052862/attachment.sig>