Jacoco with Kotlin: Line number X is greater than the source file

[Alexander Koch]

Hello,

I am using Jacoco for coverage reports in mixed Java with Kotlin projects and most of the time it is working well. In one case I am facing an issue of getting an error when a Kotlin file is analyzed. 

I have a maven project with Jacoco Plugin and Coverall Plugin and while Jacoco reports are fine, the Coverall plugin has an issue using Jacoco to gather information:

[ERROR] Failed to execute goal org.eluder.coveralls:coveralls-maven-plugin:4.1.0:report (default-cli) on project BinaryDataParser: Build error: Line number 91 is greater than the source file bdp-processor/src/main/java/org/ak80/bdp/MappedClass.kt size -> [Help 1]

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eluder.coveralls:coveralls-maven-plugin:4.1.0:report (default-cli) on project BinaryDataParser: Build error

        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)

        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)

        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)

        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)

        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)

        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)

        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)

        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)

        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)

        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)

        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)

        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)

        at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

        at java.lang.reflect.Method.invoke(Method.java:483)

        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)

        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)

        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)

        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

Caused by: org.apache.maven.plugin.MojoExecutionException: Build error

        at org.eluder.coveralls.maven.plugin.CoverallsReportMojo.execute(CoverallsReportMojo.java:251)

        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)

        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)

        ... 20 more

Caused by: java.lang.IllegalArgumentException: Line number 91 is greater than the source file bdp-processor/src/main/java/org/ak80/bdp/MappedClass.kt size

        at org.eluder.coveralls.maven.plugin.domain.Source.addCoverage(Source.java:92)

        at org.eluder.coveralls.maven.plugin.parser.JaCoCoParser.onEvent(JaCoCoParser.java:61)

        at org.eluder.coveralls.maven.plugin.parser.AbstractXmlEventParser.parse(AbstractXmlEventParser.java:64)

        at org.eluder.coveralls.maven.plugin.CoverallsReportMojo.writeCoveralls(CoverallsReportMojo.java:366)

        at org.eluder.coveralls.maven.plugin.CoverallsReportMojo.execute(CoverallsReportMojo.java:240)

        ... 22 more

I anyone able to help me solve this please?

with regards

Alex

[Marc R. Hoffmann]

Hi Alex,

JaCoCo simply uses the debug information contained in class files. What could go wrong in your case:

1) Kotlin compiler created wrong line number informations --> Check with javap -v whether the debug line numbers make sense (alternatively send source & class file to this list)
2) coveralls-maven-plugin has a bug --> report to them

Regards,
-marc

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