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authorBen Gamari <bgamari.foss@gmail.com>2017-07-11 12:01:05 -0400
committerBen Gamari <ben@smart-cactus.org>2017-07-11 13:41:55 -0400
commitccb849f8ea39582d2cfc5c045abe9768992dccb6 (patch)
treef8e57c34666475019a8451b88af81a3730018e26 /docs
parentfe6618b14712b829b8675fc6024dd33e9598d09a (diff)
downloadhaskell-ccb849f8ea39582d2cfc5c045abe9768992dccb6.tar.gz
users-guide/rel-notes: Describe #13875 fix
Test Plan: Read it. Reviewers: simonmar, austin Reviewed By: simonmar Subscribers: rwbarton, thomie GHC Trac Issues: #13875 Differential Revision: https://phabricator.haskell.org/D3710
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diff --git a/docs/users_guide/8.2.1-notes.rst b/docs/users_guide/8.2.1-notes.rst
index ba17e35c48..9dccc335d7 100644
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+++ b/docs/users_guide/8.2.1-notes.rst
@@ -38,6 +38,12 @@ Compiler
- TODO FIXME.
+- A bug in the :ghc-flag:`-XApplicativeDo` extension resulting in strict pattern
+ matches to be performed lazily (:ghc-ticket:`13875`) has been fixed. Note that
+ this means some programs which previously typechecked under ``ApplicativeDo``
+ will no longer as it is not possible to implement strict pattern matching
+ using only ``Applicative``.
+
- Old profiling flags ``-auto-all``, ``-auto``, and ``-caf-all`` are deprecated
and their usage provokes a compile-time warning.