[native-image] Unsupported type java.lang.invoke.MemberName is reachable

[kaspernielsen]

The following piece of code fails for image generation with

com.oracle.svm.core.util.UserError$UserException: com.oracle.svm.hosted.substitute.DeletedElementException: Unsupported type java.lang.invoke.MemberName is reachable: All methods from java.lang.invoke should have been replaced during image building.
To diagnose the issue, you can add the option --report-unsupported-elements-at-runtime. The unsupported element is then reported at run time when it is accessed the first time.
Detailed message:
Trace:
	at parsing java.lang.invoke.MethodHandles$Lookup.findConstructor(MethodHandles.java:1264)
Call path from entry point to java.lang.invoke.MethodHandles$Lookup.findConstructor(Class, MethodType):
	at java.lang.invoke.MethodHandles$Lookup.findConstructor(MethodHandles.java:1260)

public class HelloWorld {
    static {
        getEmptyConstructor(HelloWorld.class);
    }

    public static void main(String... args) {
        getEmptyConstructor(HelloWorld.class);
    }

    static void getEmptyConstructor(Class<?> c) {
        try {
            MethodHandles.lookup().findConstructor(c, MethodType.methodType(void.class));
        } catch (ReflectiveOperationException e) {
            throw new Error(e);
        }
    }
}

Pretty must all reflective methods on MethodsHandles.Lookup fails in a similar way

[kaspernielsen]

A simpler example

public class HelloWorld {

    static final Constructor<?> CON = HelloWorld.class.getDeclaredConstructors()[0];

    public static void main(String... args) throws IllegalAccessException {
        MethodHandles.lookup().unreflectConstructor(CON);
    }
}

[kaspernielsen]

I run with --initialize-at-build-time= HelloWorld

[cstancu]

The underlying issue here is incomplete MethodHandle support. That is under development and is being tracked by #2761.