CHANGELOG.md in activesupport-5.0.0.1 vs CHANGELOG.md in activesupport-5.0.1.rc1

@@ -1,4 +1,101 @@
+## Rails 5.0.1.rc1 (December 01, 2016) ##
+
+*   Ensure duration parsing is consistent across DST changes
+
+    Previously `ActiveSupport::Duration.parse` used `Time.current` and
+    `Time#advance` to calculate the number of seconds in the duration
+    from an arbitrary collection of parts. However as `advance` tries to
+    be consistent across DST boundaries this meant that either the
+    duration was shorter or longer depending on the time of year.
+
+    This was fixed by using an absolute reference point in UTC which
+    isn't subject to DST transitions. An arbitrary date of Jan 1st, 2000
+    was chosen for no other reason that it seemed appropriate.
+
+    Additionally, duration parsing should now be marginally faster as we
+    are no longer creating instances of `ActiveSupport::TimeWithZone`
+    every time we parse a duration string.
+
+    Fixes #26941.
+
+    *Andrew White*
+
+*   Fix `DateAndTime::Calculations#copy_time_to`. Copy `nsec` instead of `usec`.
+
+    Jumping forward or backward between weeks now preserves nanosecond digits.
+
+    *Josua Schmid*
+
+*   Avoid bumping the class serial when invoking executor.
+
+    *Matthew Draper*
+
+*   Fix `ActiveSupport::TimeWithZone#in` across DST boundaries.
+
+    Previously calls to `in` were being sent to the non-DST aware
+    method `Time#since` via `method_missing`. It is now aliased to
+    the DST aware `ActiveSupport::TimeWithZone#+` which handles
+    transitions across DST boundaries, e.g:
+
+        Time.zone = "US/Eastern"
+
+        t = Time.zone.local(2016,11,6,1)
+        # => Sun, 06 Nov 2016 01:00:00 EDT -05:00
+
+        t.in(1.hour)
+        # => Sun, 06 Nov 2016 01:00:00 EST -05:00
+
+    Fixes #26580.
+
+    *Thomas Balthazar*
+
+*   Fix `thread_mattr_accessor` subclass no longer overwrites parent.
+
+    Assigning a value to a subclass using `thread_mattr_accessor` no
+    longer changes the value of the parent class. This brings the
+    behavior inline with the documentation.
+
+    Given:
+
+        class Account
+          thread_mattr_accessor :user
+        end
+
+        class Customer < Account
+        end
+
+        Account.user = "DHH"
+        Customer.user = "Rafael"
+
+    Before:
+
+        Account.user  # => "Rafael"
+
+    After:
+
+        Account.user  # => "DHH"
+
+    *Shinichi Maeshima*
+
+*   Since weeks are no longer converted to days, add `:weeks` to the list of
+    parts that `ActiveSupport::TimeWithZone` will recognize as possibly being
+    of variable duration to take account of DST transitions.
+
+    Fixes #26039.
+
+    *Andrew White*
+
+*   Fix `ActiveSupport::TimeZone#strptime`. Now raises `ArgumentError` when the
+    given time doesn't match the format. The error is the same as the one given
+    by Ruby's `Date.strptime`. Previously it raised
+    `NoMethodError: undefined method empty? for nil:NilClass.` due to a bug.
+
+    Fixes #25701.
+
+    *John Gesimondo*
+
+
 ## Rails 5.0.0 (June 30, 2016) ##
 
 *   Support parsing JSON time in ISO8601 local time strings in
     `ActiveSupport::JSON.decode` when `parse_json_times` is enabled.
     Strings in the format of `YYYY-MM-DD hh:mm:ss` (without a `Z` at