Hello everyone, The GHC team is very pleased to announce the first 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-rc1/
This is the first of a few 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
Unfortunately there are still a few known issues in this release,
including a few compiler panics (#13233, #13509) and a memory leak in
the simplifier (#13426) which may adversely affect heap sizes and
compilation time for some modules. This memory leak unfortunately made
it impossible to provide a 32-bit Windows distribution for this
candidate; this will be resolved in -rc2.
As always, please let us know if you have difficulty. Thanks to everyone
who has contributed to this release!
Happy testing,
- Ben
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