Application.java

package controllers;

import java.util.HashMap;
import play.mvc.Controller;

public class Application extends Controller {
    static String problematicMethod() {
		final HashMap<String, String[]> map;
		map = new HashMap<String, String[]>();
		map.put("key", new String[] { "v1", "v2" });
        final String[] val = map.get("key");
        return val[0] + val[1];
    }
    public static void index() {
    	await(1);
        render();
    }
}

SimpleClient.java

package controllers;

import java.util.HashMap;
import play.mvc.Controller;

public class SimpleClient extends Controller {
    static String problematicMethod() {
		final HashMap<String, String[]> map;
		map = new HashMap<String, String[]>();
		map.put("key", new String[] { "v1", "v2" });
        final String[] val = map.get("key");
        return val[0] + val[1];
    }
    public static void index() {
    	await(1);
    	render();
    }
}

SimpleClient_precompile.log

22:04:16,642 ERROR ~ Cannot start in PROD mode with errors
java.lang.Error: Internal error
        at org.objectweb.asm.tree.analysis.SimpleVerifier.getElementValue(Unknown Source)
        at org.objectweb.asm.tree.analysis.BasicVerifier.binaryOperation(Unknown Source)
        at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
        at org.apache.commons.javaflow.bytecode.transformation.asm.MonitoringFrame.execute(MonitoringFrame.java:72)
        at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
        at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer$2.analyze(ContinuationMethodAnalyzer.java:128)
        at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:139)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:49)
        at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:41)
        at play.classloading.enhancers.ContinuationEnhancer.enhanceThisClass(ContinuationEnhancer.java:65)
        at play.CorePlugin.enhance(CorePlugin.java:293)
        at play.plugins.PluginCollection.enhance(PluginCollection.java:451)
        at play.classloading.ApplicationClasses$ApplicationClass.enhance(ApplicationClasses.java:208)
        at play.classloading.ApplicationClassloader.loadApplicationClass(ApplicationClassloader.java:157)
        at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:417)
        at play.Play.preCompile(Play.java:566)
        at play.Play.init(Play.java:291)
        at play.server.Server.main(Server.java:158)