1 files changed, 34 insertions, 0 deletions
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index f65d9ea120..ddc92dbd23 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,37 @@
+*   Fixed `ActiveSupport::Duration#eql?` so that `1.second.eql?(1.second)` is
+    true.
+
+    This fixes the current situation of:
+
+        1.second.eql?(1.second) #=> false
+
+    `eql?` also requires that the other object is an `ActiveSupport::Duration`.
+    This requirement makes `ActiveSupport::Duration`'s behavior consistent with
+    the behavior of Ruby's numeric types:
+
+        1.eql?(1.0) #=> false
+        1.0.eql?(1) #=> false
+
+        1.second.eql?(1) #=> false (was true)
+        1.eql?(1.second) #=> false
+
+        { 1 => "foo", 1.0 => "bar" }
+        #=> { 1 => "foo", 1.0 => "bar" }
+
+        { 1 => "foo", 1.second => "bar" }
+        # now => { 1 => "foo", 1.second => "bar" }
+        # was => { 1 => "bar" }
+
+    And though the behavior of these hasn't changed, for reference:
+
+        1 == 1.0 #=> true
+        1.0 == 1 #=> true
+
+        1 == 1.second #=> true
+        1.second == 1 #=> true
+
+    *Emily Dobervich*
+
 *   `ActiveSupport::SafeBuffer#prepend` acts like `String#prepend` and modifies
     instance in-place, returning self. `ActiveSupport::SafeBuffer#prepend!` is
     deprecated.