Failed to run on Java 21

[anbusampath]

Execution default-cli of goal se.kth.castor:depclean-maven-plugin:2.0.6:depclean failed: Unsupported class file major version 65

[andresnssbx]

@anbusampath did you find any solution?

[jwachter]

One solution you should be able to use is to manage the plugin (temporarily) in your project and define newer Versions of the ASM Libraries as direct plugin dependencies. As the error only stems from ASM not being able to read the newer bytecode it is enough to use an up-to-date version that supports the newer bytecode levels.

<pluginManagement>
      <plugins>
        <plugin>
          <groupId>se.kth.castor</groupId>
          <artifactId>depclean-maven-plugin</artifactId>
          <version>2.0.6</version>
          <dependencies>
            <dependency>
                <groupId>org.ow2.asm</groupId>
                <artifactId>asm-util</artifactId>
                <version>9.7</version>
            </dependency>
            <dependency>
                <groupId>org.ow2.asm</groupId>
                <artifactId>asm-tree</artifactId>
                <version>9.7</version>
            </dependency>
            <dependency>
                <groupId>org.ow2.asm</groupId>
                <artifactId>asm-commons</artifactId>
                <version>9.7</version>
            </dependency>
            <dependency>
                <groupId>org.ow2.asm</groupId>
                <artifactId>asm</artifactId>
                <version>9.7</version>
            </dependency>
          </dependencies>
        </plugin>
  ...
  </plugins>
</pluginManagement>

[goodale]

note to others that may be experiencing this issue

if you are using a repo and the pom you want to analyze inherits from the pom defining the plugin be sure to push your parent pom to remote and then do a mvn -U clean to ensure the pom being analyzed gets the update with the specific asm version that resolves the issue