VerifyError - Bad type on operand stack

[ghost]

The first sample works well with version 0.5.6 but the second sample throws exception for the version 0.6.5

package com.ui4j.test;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.concurrent.Callable;

import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.ClassLoadingStrategy;
import net.bytebuddy.instrumentation.MethodDelegation;
import net.bytebuddy.instrumentation.method.bytecode.bind.annotation.AllArguments;
import net.bytebuddy.instrumentation.method.bytecode.bind.annotation.Origin;
import net.bytebuddy.instrumentation.method.bytecode.bind.annotation.RuntimeType;
import net.bytebuddy.instrumentation.method.bytecode.bind.annotation.SuperCall;
import net.bytebuddy.instrumentation.method.bytecode.bind.annotation.This;
import net.bytebuddy.matcher.ElementMatchers;

import com.ui4j.webkit.proxy.WebKitProxy;

public class Main {

    public static interface Element {

        Element addClass(String... names);

        Element removeClass(String... name);
    }

    public static class WebKitElement implements Element {

        public WebKitElement() {
        }

        @Override
        public Element addClass(String... names) {
            return this;
        }

        @Override
        public Element removeClass(String... name) {
            return this;
        }
    }

    public static class WebKitInterceptor {

        @RuntimeType
        public static Object execute(@SuperCall Callable<Object> callable,
                                                @This Object that,
                                                @Origin Method method,
                                                @AllArguments Object[] arguments) {
            try {
                return callable.call();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

    public static void main(String[] args) throws Exception {
        Class<? extends WebKitElement> loaded = new ByteBuddy()
                                .subclass(WebKitElement.class)
                                .method(ElementMatchers.any()
                                                .and(ElementMatchers.not(ElementMatchers.isDeclaredBy(Object.class))
                                                .and(ElementMatchers.not(ElementMatchers.nameStartsWith("getEngine")))))
                                .intercept(MethodDelegation.to(WebKitInterceptor.class))
                                .make()
                                .load(WebKitProxy.class.getClassLoader(), ClassLoadingStrategy.Default.WRAPPER)
                                .getLoaded();
        Constructor<? extends WebKitElement> constructor = loaded.getConstructor();
        WebKitElement instance = constructor.newInstance();
        instance.addClass("foo", "bar");
    }
}

package com.ui4j.test;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.concurrent.Callable;

import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.MethodDelegation;
import net.bytebuddy.implementation.bind.annotation.AllArguments;
import net.bytebuddy.implementation.bind.annotation.Origin;
import net.bytebuddy.implementation.bind.annotation.RuntimeType;
import net.bytebuddy.implementation.bind.annotation.SuperCall;
import net.bytebuddy.implementation.bind.annotation.This;
import net.bytebuddy.matcher.ElementMatchers;

import com.ui4j.webkit.proxy.WebKitProxy;

public class Main {

    public static interface Element {

        Element addClass(String... names);

        Element removeClass(String... name);
    }

    public static class WebKitElement implements Element {

        public WebKitElement() {
        }

        @Override
        public Element addClass(String... names) {
            return this;
        }

        @Override
        public Element removeClass(String... name) {
            return this;
        }
    }

    public static class WebKitInterceptor {

        @RuntimeType
        public static Object execute(@SuperCall Callable<Object> callable,
                                                @This Object that,
                                                @Origin Method method,
                                                @AllArguments Object[] arguments) {
            try {
                return callable.call();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

    public static void main(String[] args) throws Exception {
        Class<? extends WebKitElement> loaded = new ByteBuddy()
                                .subclass(WebKitElement.class)
                                .method(ElementMatchers.any()
                                                .and(ElementMatchers.not(ElementMatchers.isDeclaredBy(Object.class))
                                                .and(ElementMatchers.not(ElementMatchers.nameStartsWith("getEngine")))))
                                .intercept(MethodDelegation.to(WebKitInterceptor.class))
                                .make()
                                .load(WebKitProxy.class.getClassLoader(), ClassLoadingStrategy.Default.WRAPPER)
                                .getLoaded();
        Constructor<? extends WebKitElement> constructor = loaded.getConstructor();
        WebKitElement instance = constructor.newInstance();
        instance.addClass("foo", "bar");
    }
}

Exception in thread "main" java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    com/ui4j/test/Main$WebKitElement$ByteBuddy$x3pjoCmV.addClass([Ljava/lang/String;)Lcom/ui4j/test/Main$Element; @6: invokespecial
  Reason:
    Type '[Ljava/lang/String;' (current frame, stack[3]) is not assignable to 'java/lang/String'
  Current Frame:
    bci: @6
    flags: { }
    locals: { 'com/ui4j/test/Main$WebKitElement$ByteBuddy$x3pjoCmV', '[Ljava/lang/String;' }
    stack: { uninitialized 0, uninitialized 0, 'com/ui4j/test/Main$WebKitElement$ByteBuddy$x3pjoCmV', '[Ljava/lang/String;' }
  Bytecode:
    0x0000000: bb00 2059 2a2b b700 212a b200 2404 bd00
    0x0000010: 1559 032b 53b8 001b c000 1db0          

    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.getConstructor(Unknown Source)
    at com.ui4j.test.Main.main(Main.java:69)

[raphw]

I found the bug. Currently, I am releasing a new bug-fix version. It should be synchronized to Maven Central in a couple of hours.