Hi, I've built shenandoah/jdk10 (47374:9e4135b88ace, 31 Oct, Stop string dedup thread during VM shutdown) and picked it as a JDK for IntelliJI DEA 2017.2.5. It crashes with both Shenandoah and G1 (see replay / hs_err attached or https://gist.github.com/vlsi/07003f857efed699421ebc26c8293b38 ) Vladimir