diff options
Diffstat (limited to 'docs/users_guide/9.2.1-notes.rst')
| -rw-r--r-- | docs/users_guide/9.2.1-notes.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/docs/users_guide/9.2.1-notes.rst b/docs/users_guide/9.2.1-notes.rst index 30a58175f4..283615b7a4 100644 --- a/docs/users_guide/9.2.1-notes.rst +++ b/docs/users_guide/9.2.1-notes.rst @@ -14,6 +14,11 @@ Language (Serrano et al, ICFP 2020). More information here: :ref:`impredicative-polymorphism`. This replaces the old (undefined, flaky) behaviour of the :extension:`ImpredicativeTypes` extension. +* Kind inference for data/newtype instance declarations is slightly + more restrictive than before. See the user manual :ref:`kind-inference-data-family-instances`. + This is a breaking change, albeit a fairly obscure one that corrects a specification bug. + + Compiler ~~~~~~~~ |