This brings a number of interesting bugfixes and improvements into sh/jdk: http://cr.openjdk.java.net/~rkennke/upstream-jdk13-merge-2019-04-04/changes.txt Merge did have some conflicts in shenandoahBarrierSet* and shenandoahSupport*, but nothing very serious. Testing: hotspot_gc_shenandoah is good Ok? Roman