deprecate function instance

Author: L0neGamer

Control/DeepSeq.hs

@@ -531,7 +531,12 @@ instance NFData1 Fixed where liftRnf _ = rwhnf
 --  This assumes that WHNF is equivalent to NF for functions.
 --
 --  @since 1.3.0.0
+--  @deprecated 1.5.1.1
+#if __GLASGOW_HASKELL__ >= 910
+instance {-# DEPRECATED "functions cannot be in normal form" #-} NFData (a -> b) where rnf = rwhnf
+#else
 instance NFData (a -> b) where rnf = rwhnf
+#endif
 
 -- Rational and complex numbers.
 

changelog.md

@@ -2,7 +2,10 @@
 
 ## Upcoming
 
+## 1.5.1.1
 
+  * Deprecate function instance of NFData
+    ([#16](https://github.com/haskell/deepseq/issues/16), [#109](https://github.com/haskell/deepseq/issues/109))
 
 ## 1.5.1.0
 

deepseq.cabal

@@ -1,6 +1,6 @@
 cabal-version:  1.12
 name:           deepseq
-version:        1.5.1.0
+version:        1.5.1.1
 -- NOTE: Don't forget to update ./changelog.md
 
 license:        BSD3