When working with latest version of Nashorn I noticed a regression. Code that used to work on 1.8.0_05-b13 does not work on home made build from 847387339a56 tag jdk8u20-b18. To reproduce $ hg clone http://source.apidesign.org/hg/html~html4j/ $ cd html~html4j $ hg up -C 444b861dc45a $ mvn clean install this passes OK on 1.8.0_05-b13 (my default VM), but when I execute it as JAVA_HOME=/build-jdk8u20-b18/linux-x86_64-normal-server-release/images/j2sdk-image mvn clean install -Djfxrt.jar=/usr/lib/jvm/java-8-oracle/jre/lib/ext/jfxrt.jar there is a ClassCastException: java.lang.ClassCastException: jdk.nashorn.api.scripting.ScriptObjectMirror cannot be cast to [Ljava.lang.Object; at org.netbeans.html.ko4j.Knockout.allocJS(Knockout.java) I will investigate the details, but clearly something changed significantly and I feel I should report that as soon as possible.
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