The next patch release for Crystal is scheduled for next Thursday (2019-04-04). As with the previous patch releases, there is a tracking issue: ros2/ros2#668 .
This patch release is driven by an updated release of our default RMW implementation provider, Fast-RTPS, which resolves a number of underlying issues. See our backport proposal for details.
AMD64 packages of the latest pre-release state are available in the testing repository already and ARM64 packages won’t be far behind.
There are a few more releases scheduled for rclpy and launch and I’ll update this thread when we have a likely final release candidate.