Some ASM methods are not usable without access to some Java types

[GirafiStudios]

Methods like AbstractInsnNode.clone(Map<LabelNode, LabelNode> clonedLabels) cannot be called from Nashorn without using Java.type("java.util.HashMap") or some other Map type, but CoreModEngine does not allow access to java.util.HashMap (Java.type("java.util.HashMap") fails with java.lang.ClassNotFoundException: java.util.HashMap).

As far as I can tell, Javascript objects in Nashorn are Maps, but only support String keys. Doing something like

var LabelNode = Java.type("org.objectweb.asm.tree.LabelNode");
var instruction = new LabelNode();
var map = {};
instruction.clone(map);

will give an error like:

key should be a String. It is org.objectweb.asm.tree.LabelNode instead. java.lang.ClassCastException: key should be a String. It is org.objectweb.asm.tree.LabelNode instead. at jdk.nashorn.api.scripting.ScriptObjectMirror.checkKey(ScriptObjectMirror.java:884) at jdk.nashorn.api.scripting.ScriptObjectMirror.get(ScriptObjectMirror.java:381) at org.objectweb.asm.tree.LabelNode.clone(LabelNode.java:73) at jdk.nashorn.internal.scripts.Script$Recompilation$5$18587A$\^eval\_.ASMHelper#cloneInsnList(<eval>:453) at jdk.nashorn.internal.scripts.Script$Recompilation$1$909$\^eval\_.initializeCoreMod(<eval>:58) at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:637)

[James103]

As far as I can tell, this is a major problem, preventing several major mods, including AppleCore and Iguana Tweaks Reborn from being fully ported over to 1.15.

[Insane96]

Iguana Tweaks Reborn from being fully ported over to 1.15.

Actually the features required from AppleCore are for porting Hunger Ovehaul.