Xtend 2.14.0 / Java 10: Illegal reflective access by guice 3

[Michael Bischoff]

Hello,

I tried the new xtext / xtend with Java 10.

Everything works fine for me, but I get the following warnings:

[INFO] --- xtend-maven-plugin:2.14.0:compile (default) @ jpaw-money-test ---

WARNING: An illegal reflective access operation has occurred

WARNING: Illegal reflective access by com.google.inject.internal.cglib.core.$ReflectUtils$2 (file:/home/mbi/.m2/repository/com/google/inject/guice/3.0/guice-3.0.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)

WARNING: Please consider reporting this to the maintainers of com.google.inject.internal.cglib.core.$ReflectUtils$2

WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations

WARNING: All illegal access operations will be denied in a future release

According to https://github.com/google/guice/issues/1085, for Java 9 at least guice 4.2.0 is required due to an old version of asm in prior versions, and the request to the guice team is to build a 4.2.1 with at least asm 6.1.1 (for Java 10) or better 6.2 (for Java 11).

Are there plans to upgrade xtext / xtend to a newer guice as well, to avoid the warnings, or is this something which can be achieved by declaring additional dependencies in the pom?

Best regards,

     Michael

[Karsten Thoms]

We will eliminate those discouraged calls. At the moment they are... warnings. We are aware of that. You might try to overload the ASM plugin dependency with v6.1.1.

~Karsten

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[Christian Dietrich]

this is not asm releated. it is guice related. https://github.com/eclipse/xtext-core/issues/506 https://github.com/eclipse/xtext-core/issues/393

[Michael Bischoff]

Hi,

thanks a lot for the info.

I will ignore the warning right now and hope it's still just a warning with Java 11.

Best regards,

    Michael

[Michael Bischoff]

Hi,

there may be issues with Java 11...

The posts https://github.com/cglib/cglib/issues/93 and https://mydailyjava.blogspot.com/2018/04/jdk-11-and-proxies-in-world-past.html

state that cglib will not be upgraded to be Java 11 compatible. This may in turn have some impact on Java 11 compatibility for guice.

Best regards,

    Michael

[Karsten Thoms]

Could be. We are not yet working on Java 11 support, but will definetely do. Is on our list for 2.15.