[ANNOUNCE] GHC 8.2.2 release candidate 2

Ben Gamari ben at well-typed.com
Tue Oct 31 18:15:24 UTC 2017

Hello everyone,

The GHC team is very pleased to announce the second candidate of the
8.2.2 release of the Glasgow Haskell Compiler. Source and binary
distributions are available at


This is the second and hopefully last of two release candidates leading
up the final 8.2.2 release. This release fixes approximately fifty bugs
present in 8.2.1. These most notably include,

 * A correctness issue resulting in segmentation faults in some
   FFI-users (#13707, #14346)

 * A correctness issue resulting in undefined behavior in some programs
   using STM (#14171)

 * A bug which may have manifested in segmentation faults in
   out-of-memory condition (#14329)

 * clearBit of Natural no longer bottoms (#13203)

 * A specialisation bug resulting in exponential blowup of compilation
   time in some specialisation-intensive programs (#14379)

 * ghc-pkg now works even in environments with misconfigured NFS mounts

 * GHC again supports production of position-independent executables

 * Better error messages around kind mismatches (#11198, #12373, #13530,

See [1] for the full list.

As always, please report any issues you encounter.

Happy testing,

- Ben

[1] https://ghc.haskell.org/trac/ghc/query?status=closed&milestone=8.2.2&col=id&col=summary&col=status&col=type&col=priority&col=milestone&col=component&order=priority
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