Decouple ``FunctionDef`` and ``Lambda`` (#2115)

As discussed in #2112 we really need to decouple this nodes.

1 files changed, 7 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index a97c1c3b..cbc2edac 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,6 +10,13 @@ Release date: TBA
 
   Closes #1780
 
+* ``nodes.FunctionDef`` no longer inherits from ``nodes.Lambda``.
+  This is a breaking change but considered a bug fix as the nodes did not share the same
+  API and were not interchangeable.
+
+  We have tried to minimize the amount of breaking changes caused by this change
+  but some are unavoidable.
+
 * Improved signature of the ``__init__`` and ``__postinit__`` methods of the following nodes:
   - ``nodes.AnnAssign``
   - ``nodes.Arguments``