From ae64588a4963b06a093636be6686345bd3a9bca8 Mon Sep 17 00:00:00 2001
From: brandonkelly <brandon@pixelandtonic.com>
Date: Fri, 26 Apr 2019 11:52:10 -0700
Subject: [PATCH] Reserve 'behavior' and 'behaviors' field handles

Resolves #4184
---
 CHANGELOG-v3.md    | 1 +
 src/base/Field.php | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/CHANGELOG-v3.md b/CHANGELOG-v3.md
index 5c32eea213c..8a3e1667747 100644
--- a/CHANGELOG-v3.md
+++ b/CHANGELOG-v3.md
@@ -5,6 +5,7 @@
 ### Changed
 - Craft now registers its project config event handlers before loading plugins. ([#3943](https://github.com/craftcms/cms/issues/3943))
 - The Control Panel now uses jQuery 3.4.0. ([#4183](https://github.com/craftcms/cms/issues/4183))
+- `behavior` and `behaviors` are now reserved field handles. ([#4184](https://github.com/craftcms/cms/issues/4184))
 
 ### Fixed
 - Fixed an error where rebuilding the project config would not typecast the `propagateEntries` and `enableVersioning` section settings correctly. ([#3695](https://github.com/craftcms/cms/issues/3695))
diff --git a/src/base/Field.php b/src/base/Field.php
index d9fc9dbdfa4..12d2fab6983 100644
--- a/src/base/Field.php
+++ b/src/base/Field.php
@@ -192,6 +192,8 @@ public function rules()
                 'archived',
                 'attributeLabel',
                 'attributes',
+                'behavior',
+                'behaviors',
                 'children',
                 'contentTable',
                 'dateCreated',