Program: 20705
Project: 20705
Buggy source:
public boolean findPassword(String password){
  crack++;
  con.fireEvent(ExtractionConstants.WRAPPER_PASSWORT_CRACKING);
  try {
    if (inArchive != null) {
      inArchive.close();
    }
    if (archive.getType() == Archive.SINGLE_FILE) {
      inArchive=SevenZip.openInArchive(format,stream,password);
    }
 else     if (archive.getType() == Archive.MULTI) {
      if (multiopener != null) {
        multiopener.close();
      }
      multiopener=new MultiOpener(password);
      IInStream inStream=new VolumedArchiveInStream(archive.getFirstDownloadLink().getFileOutput(),multiopener);
      inArchive=SevenZip.openInArchive(ArchiveFormat.SEVEN_ZIP,inStream);
    }
 else     if (archive.getType() == Archive.MULTI_RAR) {
      if (raropener != null) {
        raropener.close();
      }
      raropener=new RarOpener(password);
      IInStream inStream=raropener.getStream(archive.getFirstDownloadLink().getFileOutput());
      inArchive=SevenZip.openInArchive(ArchiveFormat.RAR,inStream,raropener);
    }
    long size=0;
    final BooleanHelper passwordfound=new BooleanHelper();
    for (    ISimpleInArchiveItem item : inArchive.getSimpleInterface().getArchiveItems()) {
      size+=item.getSize();
      if (!passwordArchive && !passwordfound.getBoolean()) {
        try {
          final String path=item.getPath();
          item.extractSlow(new ISequentialOutStream(){
            public int write(            byte[] data) throws SevenZipException {
              if (passwordExtracting) {
                passwordfound.found();
                return 0;
              }
              int length=0;
              if (new Regex(path,"String_Node_Str").matches()) {
                length=37000;
              }
 else               if (new Regex(path,"String_Node_Str").matches()) {
                length=512;
              }
 else {
                length=32;
              }
              if (length > data.length) {
                length=data.length;
              }
              StringBuilder sigger=new StringBuilder();
              for (int i=0; i < length - 1; i++) {
                String s=Integer.toHexString(data[i]);
                s=(s.length() < 2 ? "String_Node_Str" + s : s);
                s=s.substring(s.length() - 2);
                sigger.append(s);
              }
              Signature signature=FileSignatures.getSignature(sigger.toString());
              if (signature != null) {
                if (signature.getExtensionSure() != null && signature.getExtensionSure().matcher(path).matches()) {
                  passwordfound.found();
                }
              }
              return 0;
            }
          }
,password);
          passwordExtracting=true;
          return false;
        }
 catch (        SevenZipException e) {
        }
      }
    }
    if (!passwordArchive && !passwordfound.getBoolean())     return false;
    archive.setSize(size);
    archive.setPassword(password);
    return true;
  }
 catch (  FileNotFoundException e) {
    return false;
  }
catch (  SevenZipException e) {
    passwordArchive=true;
    return false;
  }
catch (  IOException e) {
    e.printStackTrace();
    return false;
  }
}

Fixed version (ground truth):
public boolean findPassword(String password){
  crack++;
  con.fireEvent(ExtractionConstants.WRAPPER_PASSWORT_CRACKING);
  try {
    if (inArchive != null) {
      inArchive.close();
    }
    if (archive.getType() == Archive.SINGLE_FILE) {
      inArchive=SevenZip.openInArchive(format,stream,password);
    }
 else     if (archive.getType() == Archive.MULTI) {
      if (multiopener != null) {
        multiopener.close();
      }
      multiopener=new MultiOpener(password);
      IInStream inStream=new VolumedArchiveInStream(archive.getFirstDownloadLink().getFileOutput(),multiopener);
      inArchive=SevenZip.openInArchive(ArchiveFormat.SEVEN_ZIP,inStream);
    }
 else     if (archive.getType() == Archive.MULTI_RAR) {
      if (raropener != null) {
        raropener.close();
      }
      raropener=new RarOpener(password);
      IInStream inStream=raropener.getStream(archive.getFirstDownloadLink().getFileOutput());
      inArchive=SevenZip.openInArchive(ArchiveFormat.RAR,inStream,raropener);
    }
    long size=0;
    final BooleanHelper passwordfound=new BooleanHelper();
    String folder="String_Node_Str";
    for (    ISimpleInArchiveItem item : inArchive.getSimpleInterface().getArchiveItems()) {
      if (item.isFolder() || item.getSize() == 0) {
        continue;
      }
      if (!passwordArchive && !passwordfound.getBoolean()) {
        try {
          final String path=item.getPath();
          item.extractSlow(new ISequentialOutStream(){
            public int write(            byte[] data) throws SevenZipException {
              if (passwordExtracting) {
                passwordfound.found();
                return 0;
              }
              int length=0;
              if (new Regex(path,"String_Node_Str").matches()) {
                length=37000;
              }
 else               if (new Regex(path,"String_Node_Str").matches()) {
                length=512;
              }
 else {
                length=32;
              }
              if (length > data.length) {
                length=data.length;
              }
              StringBuilder sigger=new StringBuilder();
              for (int i=0; i < length - 1; i++) {
                String s=Integer.toHexString(data[i]);
                s=(s.length() < 2 ? "String_Node_Str" + s : s);
                s=s.substring(s.length() - 2);
                sigger.append(s);
              }
              Signature signature=FileSignatures.getSignature(sigger.toString());
              if (signature != null) {
                if (signature.getExtensionSure() != null && signature.getExtensionSure().matcher(path).matches()) {
                  passwordfound.found();
                }
              }
              return 0;
            }
          }
,password);
          passwordExtracting=true;
          return false;
        }
 catch (        SevenZipException e) {
        }
      }
      String[] erg=item.getPath().split("String_Node_Str");
      if (archive.isNoFolder() && erg.length > 1) {
        if (folder.equals("String_Node_Str")) {
          folder=erg[0];
        }
 else {
          if (!folder.equals(erg[0])) {
            archive.setNoFolder(false);
          }
        }
      }
 else {
        archive.setNoFolder(false);
      }
      size+=item.getSize();
    }
    if (!passwordArchive && !passwordfound.getBoolean())     return false;
    archive.setSize(size);
    archive.setPassword(password);
    return true;
  }
 catch (  FileNotFoundException e) {
    return false;
  }
catch (  SevenZipException e) {
    passwordArchive=true;
    return false;
  }
catch (  IOException e) {
    e.printStackTrace();
    return false;
  }
}