Changelog for ghc-generic-deriving-1.12.3-1.2.x86_64.rpm :

* Tue Feb 12 2019 psimonsAATTsuse.com- Update generic-deriving to version 1.12.3. [#] 1.12.3 [2019.02.09]
* Support `template-haskell-2.15`.
* Add a `gshowList` method to `GShow`, which lets us avoid the need for `OverlappingInstances` in `Generics.Deriving.TH`. As a consequence, the `GShow String` instance has been removed, as it is now fully subsumed by the `GShow [a]` instance (with which it previously overlapped).
* Functions in `Generics.Deriving.TH` now balance groups of `(:
*:)` and `(:+:)` as much as possible (`deriving Generic` was already performing this optimization, and now `generic-deriving` does too).
* Add a `Generics.Deriving.Default` module demonstrating and explaining how and why to use `DerivingVia`. There is also a test suite with further examples.
* Wed Dec 26 2018 psimonsAATTsuse.com- Add generic-deriving at version 1.12.2.