Not compatible with OpenJDK 14

Plugin is failing when I run with the latest JDK

 [proguard] Error: Can't read [/home/paul/.sdkman/candidates/java/14.0.0.j9-adpt/jmods/java.base.jmod] (Can't process class [module-info.class] (Unsupported version number [58.0] (maximum 57.0, Java 13)))

The project itself has an older compile target

  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>

I have tried the latest proguard-maven-plugin and proguard-base, getting the same error

        <plugin>
          <groupId>com.github.wvengen</groupId>
          <artifactId>proguard-maven-plugin</artifactId>
          <version>2.2.0</version>
          <dependencies>
            <dependency>
              <groupId>net.sf.proguard</groupId>
              <artifactId>proguard-base</artifactId>
              <version>6.2.2</version>
            </dependency>
          </dependencies>
        </plugin>

[paulerickson]

Proguard 7.0.0 with Java 14 support has been released https://github.com/Guardsquare/proguard/releases/tag/v7.0.0

[paulerickson]

This is resolved. I found an explicit dependency on the old proguard-core in a parent pom 🤦 but works like a charm with that gone.

Thanks for the help, and I’ll look forward to Java 15 support!