java.lang.IllegalStateException: CONSTANT_info: invalid tag value [18]

[Kiran Kumar]

while integrating EMMA with Gradle i am facing this issue.
java.lang.IllegalStateException: CONSTANT_info: invalid
tag value [18]

Do we have any solution for this issue please let me know.

here is the script :

apply plugin: "emma"
configurations{
emma
}

dependencies{
emma "emma:emma:2.0.5312"
emma "emma:emma_ant:2.0.5312"
}

def emmaConvention = new EmmaPluginConvention(project)
project.convention.plugins.emma = emmaConvention

class EmmaPluginConvention{
def verbosityLevel = "info"
def reportPath;
def coverageFileName;
def tmpDir;
def instrDir;
def metaDataFilePath;

def emma(Closure close){
    close.delegate = this;
    close.run()
}

EmmaPluginConvention(Project project){
    reportPath          = "${project.reportsDir.absolutePath}/emma"
    coverageFileName    = "coverage"
    tmpDir              = "${project.buildDir}/tmp/emma"
    instrDir            = "${tmpDir}/instr"
    metaDataFilePath    = "${tmpDir}/metadata.emma"
}

}

test{
//setup JVM Arguments for emma coverage
jvmArgs "-Demma.coverage.out.file=${emmaConvention.metaDataFilePath}", "-Demma.coverage.out.merge=true"

//add 
doFirst{
    ant.taskdef( resource:"emma_ant.properties", classpath: configurations.emma.asPath)
    ant.path(id:"run.classpath"){
        pathelement(location:sourceSets.main.output.classesDir.absolutePath ) 
    }
    ant.emma(verbosity:"${emmaConvention.verbosityLevel}"){
        instr(merge:"true", destdir:"${emmaConvention.instrDir}", instrpathref:"run.classpath", metadatafile:"${emmaConvention.metaDataFilePath}"){
            instrpath{
                fileset(dir:sourceSets.main.classesDir.absolutePath, includes:"*.class")
            }
        }
    }
    setClasspath(files("${emmaConvention.instrDir}") + configurations.emma +  getClasspath())
}

doLast{
    ant.path(id:"src.path"){
        sourceSets.main.java.srcDirs.each{
            pathelement(location:it.absolutePath ) 
        }
    }
    ant.emma(enabled:"true"){

        report(sourcepathref:"src.path"){
            fileset(dir:"${emmaConvention.tmpDir}"){
                include(name:"*.emma")
            }
            txt(outfile:"${emmaConvention.reportPath}/coverage.txt")
            html(outfile:"${emmaConvention.reportPath}/coverage.html")
            xml(outfile:"${emmaConvention.reportPath}/coverage.xml")
        }
    }
}

}

[vicush]

You must be using some lambda expressions or stream api of Java 8.
What helped me out of this mess is compiling my code with Java 7 to find those places and then you can either exclude them from instrumentation or re-write them without Java 8 :(

Check this out
https://stackoverflow.com/questions/30313255/reflections-java-8-invalid-constant-type