"new java.util.ArrayList(['item1','item2'])" raises error

[joeydaowang]

Describe the issue We are replacing Nashorn with Graal, found code new java.util.ArrayList(['item1','item2']) works in Nashorn but raises error in Graal. I am wondering whether it is an issue in Graal.

Steps to reproduce the issue Here is some code Context.Builder graalContextBuilder = Context.newBuilder() .allowExperimentalOptions(true) .option("js.nashorn-compat", "true")// make Nashorn external features work e.g. print function .allowHostAccess(HostAccess.ALL) .allowHostClassLookup((s) -> true); GraalJSScriptEngine grallEngine = GraalJSScriptEngine.create(null, graalContextBuilder); grallEngine.eval("new java.util.ArrayList(['item1','item2'])"); which throws exception

javax.script.ScriptException: java.lang.UnsupportedOperationException: Unsupported operation identifier 'toArray' and object '[object Array]'(language: JavaScript, type: Array). Identifier is not executable or instantiable.

GraalVM and environment:

• GraalVM version: 22.2.0
• JDK major version: OpenJDK 11.0.14
• OS: Windows 10
• Architecture: AMD64

[oubidar-Abderrahim]

Hi, Thank you for reporting this, we will take a look into it and get back to you

[lloydhazlett]

@oubidar-Abderrahim Understand being assigned to this task doesn't necessarily mean it will get looked at, but I'm also affected by this bug. Once you've had a chance to review, would it be possible to indicate whether it's likely to be a small or large effort to fix? That might help me in deciding whether to try and wait for a fix or not.

[oubidar-Abderrahim]

If this issue is still relevant in the latest GraalVM versions, please create a new issue for it and follow the template provided. Thank you