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Add release note for Foxy patch release 7 (backport #2262) #2287

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Feb 8, 2022
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Add release note for Foxy patch release 7 (backport #2262) #2287

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40 changes: 40 additions & 0 deletions source/Releases/Release-Foxy-Fitzroy.rst
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Expand Up @@ -36,6 +36,46 @@ New features in this ROS 2 release

During the development the `Foxy meta-ticket <https://github.com/ros2/ros2/issues/830>`__ on GitHub contains an up-to-date state of the ongoing high-level tasks as well as references specific tickets with more details.

Changes in Patch Release 7
--------------------------

Fix launch frontend parser
^^^^^^^^^^^^^^^^^^^^^^^^^^

A refactor of the launch frontend parser fixed some `issues parsing special characters <https://github.com/ros2/launch_ros/issues/214>`_.
As a result, there has been a small behavior change when it comes to parsing strings.
For example, previously to pass a number as a string you would have to add extra quotation marks (two sets of quotation marks were needed if using a substitution):

.. code-block:: xml

<!-- results in the string value "'3'" -->
<param name="foo" value="''3''"/>

After the refactor, the above will result in the the string ``"''3''"`` (note the extra set of quotation marks).
Now, users should use the ``type`` attribute to signal that the value should be interpreted as a string:

.. code-block:: xml

<param name="foo" value="3" type="str"/>

Related pull requests:

* `launch#530 <https://github.com/ros2/launch/pull/530>`_
* `launch_ros#265 <https://github.com/ros2/launch_ros/pull/265>`_

Fix memory leaks and undefined behavior in rmw_fastrtps_dynamic_cpp
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

API was changed in the following header files:

- ``rmw_fastrtps_dynamic_cpp/TypeSupport.hpp``
- ``rmw_fastrtps_dynamic_cpp/TypeSupport_impl.hpp``

Though technically they are publically accessible, it is unlikely people are using them directly.
Therefore, we decided to break API in order to fix memory leaks and undefined behavior.

The fix was originally submitted in `rmw_fastrtps#429 <https://github.com/ros2/rmw_fastrtps/pull/429>`_ and later backported to Foxy in `rmw_fastrtps#577 <https://github.com/ros2/rmw_fastrtps/pull/577>`_.

Changes in Patch Release 2
--------------------------

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