neow3j: Compile error: String concatentation

Compiling the class below throws an exception

public class HelloWorld {
    
    public static String hello(String arg1, String arg2) {
        return arg1 + arg2;
    }
}

Exception in thread "main" java.lang.IndexOutOfBoundsException
        at org.objectweb.asm.tree.InsnList.get(InsnList.java:94)
        at io.neow3j.compiler.NeoMethod.convert(NeoMethod.java:486)
        at io.neow3j.compiler.converters.MethodsConverter.handleUncachedMethodCall(MethodsConverter.java:193)
        at io.neow3j.compiler.converters.MethodsConverter.handleMethodCall(MethodsConverter.java:167)
        at io.neow3j.compiler.converters.MethodsConverter.handleInvoke(MethodsConverter.java:148)
        at io.neow3j.compiler.converters.MethodsConverter.convert(MethodsConverter.java:81)
        at io.neow3j.compiler.Compiler.handleInsn(Compiler.java:404)
        at io.neow3j.compiler.converters.ObjectsConverter.handleStringConcatenation(ObjectsConverter.java:301)
        at io.neow3j.compiler.converters.ObjectsConverter.handleNew(ObjectsConverter.java:167)
        at io.neow3j.compiler.converters.ObjectsConverter.convert(ObjectsConverter.java:83)
        at io.neow3j.compiler.Compiler.handleInsn(Compiler.java:404)
        at io.neow3j.compiler.NeoMethod.convert(NeoMethod.java:488)
        at io.neow3j.compiler.converters.MethodsConverter.handleUncachedMethodCall(MethodsConverter.java:193)
        at io.neow3j.compiler.converters.MethodsConverter.handleMethodCall(MethodsConverter.java:167)
        at io.neow3j.compiler.converters.MethodsConverter.handleInvoke(MethodsConverter.java:148)
        at io.neow3j.compiler.converters.MethodsConverter.convert(MethodsConverter.java:81)
        at io.neow3j.compiler.Compiler.handleInsn(Compiler.java:404)
        at io.neow3j.compiler.NeoMethod.convert(NeoMethod.java:488)
        at io.neow3j.compiler.converters.MethodsConverter.handleUncachedMethodCall(MethodsConverter.java:193)
        at io.neow3j.compiler.converters.MethodsConverter.handleMethodCall(MethodsConverter.java:167)
        at io.neow3j.compiler.converters.MethodsConverter.handleInvoke(MethodsConverter.java:148)
        at io.neow3j.compiler.converters.MethodsConverter.convert(MethodsConverter.java:81)
        at io.neow3j.compiler.Compiler.handleInsn(Compiler.java:404)
        at io.neow3j.compiler.converters.ObjectsConverter.handleStringConcatenation(ObjectsConverter.java:301)
        at io.neow3j.compiler.converters.ObjectsConverter.handleNew(ObjectsConverter.java:167)
        at io.neow3j.compiler.converters.ObjectsConverter.convert(ObjectsConverter.java:83)
        at io.neow3j.compiler.Compiler.handleInsn(Compiler.java:404)
        at io.neow3j.compiler.NeoMethod.convert(NeoMethod.java:488)
        at io.neow3j.compiler.Compiler.compile(Compiler.java:271)
        at io.neow3j.compiler.Compiler.compile(Compiler.java:240)
        at io.neow3j.examples.contractdevelopment.CompileAndDeploy.main(CompileAndDeploy.java:26)

About this issue

Original URL
State: closed
Created 3 years ago
Comments: 19 (12 by maintainers)

Most upvoted comments

That’s good to know, so from now on ill compile my contracts using the gradle task.

openjdk version “11.0.11” 2021-04-20 OpenJDK Runtime Environment (build 11.0.11+9-Ubuntu-0ubuntu2.20.04) OpenJDK 64-Bit Server VM (build 11.0.11+9-Ubuntu-0ubuntu2.20.04, mixed mode, sharing)

ykoitzsch on May 24, 2021

Hey @gsmachado that’s great news! Unfortunately I am still running into this issue. I will add the compiled class file to this post @csmuller . I am working with java 11.

StringConcatContract3.class.zip

I also did some more testing, the compile error only happens when I concatenate 2 string variables like in bongoCat2() and bongoCat3().

    public static String bongoCat() {
        return "neowwwwwwwwww" +  "something else";
    }

   /*  public static String bongoCat2(String arg1, String arg2) {
        return arg1 +  arg2;
    } */

    public static String bongoCat3String() {
        String arg1 = "hello";
        String arg2 = "world";
        return arg1 +  arg2;
    }

ykoitzsch on May 19, 2021