Program: 9553
Project: 9553
Buggy source:
/** 
 * This method extracts javac arguments to ajc, and add arguments to make ajc behave more like javac in copying resources. <p> Pass ajc-specific options using compilerarg sub-element: <pre> &lt;javac srcdir="src"> &lt;compilerarg compiler="..." line="-argfile src/args.lst"/> &lt;javac> </pre> Some javac arguments are not supported in this component (yet): <pre> String memoryInitialSize; boolean includeAntRuntime = true; boolean includeJavaRuntime = false; </pre> Other javac arguments are not supported in ajc 1.1: <pre> boolean optimize; String forkedExecutable; FacadeTaskHelper facade; boolean depend; String debugLevel; Path compileSourcepath; </pre>
 * @param javac the Javac command to implement (not null)
 * @param ajc the AjcTask to adapt (not null)
 * @param destDir the File class destination directory (may be null)
 * @return null if no error, or String error otherwise
 */
public String setupAjc(Javac javac){
  if (null == javac) {
    return "String_Node_Str";
  }
  AjcTask ajc=this;
  ajc.setProject(javac.getProject());
  ajc.setLocation(javac.getLocation());
  ajc.setTaskName("String_Node_Str");
  ajc.setDebug(javac.getDebug());
  ajc.setDeprecation(javac.getDeprecation());
  ajc.setFailonerror(javac.getFailonerror());
  final boolean fork=javac.isForkedJavac();
  ajc.setFork(fork);
  if (fork) {
    ajc.setMaxmem(javac.getMemoryMaximumSize());
  }
  ajc.setNowarn(javac.getNowarn());
  ajc.setListFileArgs(javac.getListfiles());
  ajc.setVerbose(javac.getVerbose());
  ajc.setTarget(javac.getTarget());
  ajc.setSource(javac.getSource());
  ajc.setEncoding(javac.getEncoding());
  File javacDestDir=javac.getDestdir();
  if (null != javacDestDir) {
    ajc.setDestdir(javacDestDir);
  }
  ajc.setBootclasspath(javac.getBootclasspath());
  ajc.setExtdirs(javac.getExtdirs());
  ajc.setClasspath(javac.getClasspath());
  ajc.addFiles(javac.getFileList());
  ajc.setSourceRootCopyFilter("String_Node_Str");
  ajc.readArguments(javac.getCurrentCompilerArgs());
  return null;
}

Fixed version (ground truth):
/** 
 * This method extracts javac arguments to ajc, and add arguments to make ajc behave more like javac in copying resources. <p> Pass ajc-specific options using compilerarg sub-element: <pre> &lt;javac srcdir="src"> &lt;compilerarg compiler="..." line="-argfile src/args.lst"/> &lt;javac> </pre> Some javac arguments are not supported in this component (yet): <pre> String memoryInitialSize; boolean includeAntRuntime = true; boolean includeJavaRuntime = false; </pre> Other javac arguments are not supported in ajc 1.1: <pre> boolean optimize; String forkedExecutable; FacadeTaskHelper facade; boolean depend; String debugLevel; Path compileSourcepath; </pre>
 * @param javac the Javac command to implement (not null)
 * @param ajc the AjcTask to adapt (not null)
 * @param destDir the File class destination directory (may be null)
 * @return null if no error, or String error otherwise
 */
public String setupAjc(Javac javac){
  if (null == javac) {
    return "String_Node_Str";
  }
  AjcTask ajc=this;
  ajc.setProject(javac.getProject());
  ajc.setLocation(javac.getLocation());
  ajc.setTaskName("String_Node_Str");
  ajc.setDebug(javac.getDebug());
  ajc.setDeprecation(javac.getDeprecation());
  ajc.setFailonerror(javac.getFailonerror());
  final boolean fork=javac.isForkedJavac();
  ajc.setFork(fork);
  if (fork) {
    ajc.setMaxmem(javac.getMemoryMaximumSize());
  }
  ajc.setNowarn(javac.getNowarn());
  ajc.setListFileArgs(javac.getListfiles());
  ajc.setVerbose(javac.getVerbose());
  ajc.setTarget(javac.getTarget());
  ajc.setSource(javac.getSource());
  ajc.setEncoding(javac.getEncoding());
  File javacDestDir=javac.getDestdir();
  if (null != javacDestDir) {
    ajc.setDestdir(javacDestDir);
    ajc.setSourceRootCopyFilter("String_Node_Str");
  }
  ajc.setBootclasspath(javac.getBootclasspath());
  ajc.setExtdirs(javac.getExtdirs());
  ajc.setClasspath(javac.getClasspath());
  ajc.addFiles(javac.getFileList());
  ajc.readArguments(javac.getCurrentCompilerArgs());
  return null;
}