Cobertura产生大量错误而没有输出

Question

我使用本指南将Cobertura包含在我的Maven项目中。我将以下内容添加到pom.xml：

  <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>cobertura-maven-plugin</artifactId>
    <version>2.6</version>
    <configuration>

      <formats>
        <format>html</format>       
        <format>xml</format>
      </formats>
      <outputDirectory>${project.build.directory}/surefire-reports/cobertura</outputDirectory>      
      <instrumentation>
        <ignoreTrivial>true</ignoreTrivial>         
        <ignores>
          <ignore>org.slf4j.Logger.*</ignore>       
        </ignores>
        <excludes>  
        </excludes>
      </instrumentation>
    </configuration>
    <executions>
      <execution>
        <phase>package</phase>          
        <goals>
          <goal>cobertura</goal>
        </goals>
      </execution>
    </executions>
  </plugin>

当我运行构建时，我得到这样的错误：

[cobertura] WARN  [main] net.sourceforge.cobertura.instrument.CoberturaInstrumenter - Unable to instrument file C:\MYSELF\programing\java\AutoCall\AutoClient\target\generated-classes\cobertura\cz\autoclient\autoclick\ComparablePixel.class
java.lang.IllegalArgumentException
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at net.sourceforge.cobertura.instrument.CoberturaInstrumenter.instrumentClass(CoberturaInstrumenter.java:147)
    at net.sourceforge.cobertura.instrument.CoberturaInstrumenter.instrumentClass(CoberturaInstrumenter.java:121)
    at net.sourceforge.cobertura.instrument.CoberturaInstrumenter.addInstrumentationToSingleClass(CoberturaInstrumenter.java:234)
    at net.sourceforge.cobertura.instrument.Main.addInstrumentationToSingleClass(Main.java:298)
    at net.sourceforge.cobertura.instrument.Main.addInstrumentation(Main.java:307)
    at net.sourceforge.cobertura.instrument.Main.parseArguments(Main.java:399)
    at net.sourceforge.cobertura.instrument.Main.main(Main.java:421)

它们似乎都在奇怪的文件夹ProjectName\target\generated-classes\cobertura中，我绝对没有创建。我的报告如下：

当我按Run All Tests时，我只会遇到与构建期间相同的错误。

这是什么？我的项目需要Cobertura的报告，我必须让它工作。