[BUG] Compile error on Java 21, Unsupported class file major version 65

[sblantipodi]

Describe the bug Using JDK21 from Adoptium along with the latest edge version of Lombok.

When I compile my source code I get this error:

Error:  COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
Error:  /home/runner/work/firefly_luciferin/firefly_luciferin/src/main/java/org/dpsoftware/network/MessageServer.java: 
Error during the transformation of 'org.dpsoftware.network.MessageServer$ClientHandler'; 
post-compiler 'lombok.bytecode.SneakyThrowsRemover' caused an 
exception: java.lang.IllegalArgumentException: 
Unsupported class file major version 65

This is my pom.xml

<project ...>
...
    <repositories>
        <repository>
            <id>projectlombok.org</id>
            <url>https://projectlombok.org/edge-releases</url>
        </repository>
    </repositories>
...
    <dependencies>
...
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>2.0.7</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>edge-SNAPSHOT</version>
        </dependency>
    </dependencies>
...
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${maven.compilerplugin.version}</version>
                <configuration>
                    <source>21</source>
                    <target>21</target>
                    <enablePreview>true</enablePreview>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                            <version>edge-SNAPSHOT</version>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>
            ...
        </plugins>
    </build>
...
</project>

As far as I know the latest edge version should support Java 21, isn't it?

[Rawi01]

You are right, the edge version does not include the upadted lombok.patcher dependency and I missed to mention that in the PR. As a temporary workaround you can use the build artifact of my daily JDK21 github actions run (e.g. https://github.com/Rawi01/lombok/actions/runs/6041547819). This run also builds and includes the latest lombok.patcher.

I cannot publish a new version of the patcher, thats something only @rzwitserloot or @rspilker can do. After that they can adjust the used version in the build script and release a new edge version.

[hantsy]

Got the same issue when building on Java 21.

[hantsy]

@Rawi01 Hope there is a new version to test Java 21.

[rspilker]

Please try the edge release.

[hantsy]

@rspilker I have already used it in my sample project. I got the same exception "Unsupported class file major version 65" described in this issue last week.

It includes the fixes of this issue now?

[dstango]

@rspilker I have already used it in my sample project.

It includes the fixes of this issue now?

Please check the release notes of the provided link

[hantsy]

This issue is a block for me. All of my sample projects failed to compile.

[rspilker]

@hantsy last night we released a new edge version that should address all the problems

[rspilker]

@hantsy how do you compile? Java, mvn, Gradle?

[hantsy]

@hantsy how do you compile? Java, mvn, Gradle?

I was using Maven 3.9.x, will try again in the weekend.

[hantsy]

@rspilker There is a new SNAPSHOT version published in Sep 15. Updated and verified it is worked.

Thanks.

[danishnawab]

@rzwitserloot @rspilker when will the new version (1.18.29?) be released?

[dstango]

@danishnawab https://github.com/projectlombok/lombok/issues/3393#issuecomment-1725937341

[rzwitserloot]

@danishnawab 30 minutes ago :)

[sblantipodi]

@rzwitserloot can you tell me why in the releases here on GitHub there is no release yet please? https://github.com/projectlombok/lombok/releases last release is from 2020...

[rzwitserloot]

@sblantipodi We release via maven and our website, not via that. I wonder how you even got to that page!

[sblantipodi]

@rzwitserloot aren't your sources versioned on github that is a "Smart GUI" to GIT? don't you create a TAG when you release? if so, why don't just create a release on github like every other projects?

releases is accessible from the homepage of your's github page...

[rspilker]

It is a feature, we acknowledge its existence. It is a manual extra step in the release process. And no, not every other project uses this.

[sblantipodi]

It is a feature, we acknowledge its existence. It is a manual extra step in the release process. And no, not every other project uses this.

you can write a simple GitHub action to do it automatically on a new Tag or push or whatever... having an old release on github feels bad and not accurate IMHO.

[rzwitserloot]

The readme has been slightly updated: It spells out you're in the wrong place for releases. Also, the old releases have now been deleted. We have no intention of using the github release system.

[sblantipodi]

The readme has been slightly updated: It spells out you're in the wrong place for releases. Also, the old releases have now been deleted. We have no intention of using the github release system.

now it's much better, having old releases on GitHub is confusing :) if you don't want to use that release system, it's better to not have any release.

good job! 👍