Program: 58439
Project: 58439
Buggy source:
@Override public byte[] transform(String name,String transformedName,byte[] bytes){
  if (bytes == null) {
    return null;
  }
  l:   if (scrappedData) {
    if (!parsables.contains(name)) {
      break l;
    }
    workingPath.add(transformedName);
    if (implementables.contains(name)) {
      log.info("String_Node_Str" + transformedName);
      ClassReader cr=new ClassReader(bytes);
      ClassNode cn=new ClassNode();
      cr.accept(cn,0);
      if (this.implement(cn)) {
        ClassWriter cw=new ClassWriter(ClassWriter.COMPUTE_MAXS);
        cn.accept(cw);
        bytes=cw.toByteArray();
      }
 else {
        log.debug("String_Node_Str" + transformedName);
      }
    }
    if (strippables.contains(name)) {
      log.info("String_Node_Str" + transformedName);
      ClassReader cr=new ClassReader(bytes);
      ClassNode cn=new ClassNode();
      cr.accept(cn,0);
      if (this.strip(cn)) {
        ClassWriter cw=new ClassWriter(ClassWriter.COMPUTE_FRAMES);
        cn.accept(cw);
        bytes=cw.toByteArray();
      }
 else {
        log.debug("String_Node_Str" + transformedName);
      }
    }
    workingPath.remove(workingPath.size() - 1);
  }
switch (hashes.get(transformedName)) {
case 1:
    bytes=writeWorldServer(name,transformedName,bytes,new ClassReader(bytes));
  break;
case 2:
bytes=writeWorld(name,transformedName,bytes,new ClassReader(bytes));
break;
case 3:
bytes=writeWorldProxy(name,bytes,new ClassReader(bytes));
break;
case 4:
bytes=writeWorldServerProxy(name,bytes,new ClassReader(bytes));
break;
default :
break;
}
return bytes;
}

Fixed version (ground truth):
@Override public byte[] transform(String name,String transformedName,byte[] bytes){
  if (bytes == null) {
    return null;
  }
  l:   if (scrappedData) {
    if (!parsables.contains(name)) {
      break l;
    }
    workingPath.add(transformedName);
    if (implementables.contains(name)) {
      log.info("String_Node_Str" + transformedName);
      ClassReader cr=new ClassReader(bytes);
      ClassNode cn=new ClassNode();
      cr.accept(cn,0);
      if (this.implement(cn)) {
        ClassWriter cw=new ClassWriter(ClassWriter.COMPUTE_MAXS);
        cn.accept(cw);
        bytes=cw.toByteArray();
      }
 else {
        log.debug("String_Node_Str" + transformedName);
      }
    }
    if (strippables.contains(name)) {
      log.info("String_Node_Str" + transformedName);
      ClassReader cr=new ClassReader(bytes);
      ClassNode cn=new ClassNode();
      cr.accept(cn,0);
      if (this.strip(cn)) {
        ClassWriter cw=new ClassWriter(ClassWriter.COMPUTE_FRAMES);
        cn.accept(cw);
        bytes=cw.toByteArray();
      }
 else {
        log.debug("String_Node_Str" + transformedName);
      }
    }
    workingPath.remove(workingPath.size() - 1);
  }
switch (hashes.get(transformedName)) {
case 1:
    bytes=writeWorldServer(name,transformedName,bytes,new ClassReader(bytes));
  break;
case 2:
bytes=writeWorld(name,transformedName,bytes,new ClassReader(bytes));
break;
case 3:
bytes=writeWorldProxy(name,bytes,new ClassReader(bytes));
break;
case 4:
bytes=writeWorldServerProxy(name,bytes,new ClassReader(bytes));
break;
default :
break;
}
if (ENABLE_HACK) {
synchronized (workingPath) {
workingPath.add(name);
ClassReader cr=new ClassReader(bytes);
ClassNode cn=new ClassNode();
cr.accept(cn,0);
if (cn.innerClasses != null) for (InnerClassNode node : cn.innerClasses) {
log.debug("String_Node_Str" + node.name);
if (!workingPath.contains(node.name)) try {
Class.forName(node.name,false,this.getClass().getClassLoader());
}
 catch (Throwable _) {
}
}
workingPath.remove(workingPath.size() - 1);
}
}
return bytes;
}