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-rw-r--r--libraries/base/GHC/Pack.hs5
1 files changed, 5 insertions, 0 deletions
diff --git a/libraries/base/GHC/Pack.hs b/libraries/base/GHC/Pack.hs
index ef8cec3d62..4428f354b3 100644
--- a/libraries/base/GHC/Pack.hs
+++ b/libraries/base/GHC/Pack.hs
@@ -12,6 +12,11 @@
-- Stability : internal
-- Portability : non-portable (GHC Extensions)
--
+-- ⚠ Warning: Starting @base-4.18@, this module is being deprecated.
+-- See https://gitlab.haskell.org/ghc/ghc/-/issues/21461 for more information.
+--
+--
+--
-- This module provides a small set of low-level functions for packing
-- and unpacking a chunk of bytes. Used by code emitted by the compiler
-- plus the prelude libraries.