Herbert Valerio Riedel authored
These two facilities provide some means to avoid the double-breakage caused by first by the deprecation (see #2496), and then again by the actual future field-removal. See also https://groups.google.com/d/msg/haskell-core-libraries/q9H-QlL_gnE/4lbb_mBjre8J for details about this library addition. Reviewed By: ekmett Differential Revision: https://phabricator.haskell.org/D5775b8fa46c
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