Add #1076 entry

servant/CHANGELOG.md

@@ -36,7 +36,7 @@
   - `Servant.Client.Streaming` is *used* by CPSised
     `withClientM :: ClientM a -> ClientEnv -> (Either ServantError a -> IO b) -> IO b`
 
-  If you need to access `Stream` endpoints use `Servant.Client.Streaming` with
+  To access `Stream` endpoints use `Servant.Client.Streaming` with
   `withClientM`; otherwise you can continue using `Servant.Client` with `runClientM`.
   You can use both too, `ClientEnv` and `BaseUrl` types are same for both.
 
@@ -44,6 +44,14 @@
   Requesting ordinary `Verb` endpoints (e.g. `Get`) will block until
   the whole response is received.
 
+  There is `Servant.Client.Streaming.runClientM` function, but it has
+  restricted type. `NFData a` constraint prevents using it with
+  `SourceT`, `Conduit` etc. response types.
+
+  ```haskell
+  runClientM :: NFData a => ClientM a -> ClientEnv -> IO (Either ServantError a)
+  ```
+
   This change shouldn't affect you, if you don't use streaming endpoints.
 
 - Drop support for GHC older than 8.0
@@ -62,6 +70,9 @@
 
 ### Other changes
 
+- *servant-client-core* Add `NFData (GenResponse a)` and `NFData ServantError` instances.
+  [#1076](https://github.com/haskell-servant/servant/pull/1076)
+
 - *servant* Add `lookupResponseHeader :: ... => Headers headers r -> ResponseHeader h a`
   [#1064](https://github.com/haskell-servant/servant/pull/1064)