Program: 30525
Project: 30525
Buggy source:
@Override public byte[] transform(String name,String transformedName,byte[] basicClass){
  if (basicClass == null)   return basicClass;
  try {
    if (transformedName != null && privateToPublicMethods.containsKey(transformedName)) {
      ClassNode classNode=new ClassNode();
      ClassReader classReader=new ClassReader(basicClass);
      classReader.accept(classNode,0);
      for (      publicLine Set : privateToPublicMethods.get(transformedName)) {
        makePublic(classNode,Set);
      }
      if (transformedName.equals("String_Node_Str")) {
        for (        MethodNode mn : classNode.methods) {
          if (mn.name.equals("String_Node_Str") || (mn.name.equals("String_Node_Str") && mn.desc.equals("String_Node_Str"))) {
            MethodNode newNode=new MethodNode(Opcodes.ACC_PUBLIC,"String_Node_Str",mn.desc,mn.signature,new String[0]);
            newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD,0));
            newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD,1));
            newNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL,classNode.name,mn.name,mn.desc,false));
            newNode.instructions.add(new InsnNode(Opcodes.RETURN));
            log(newNode.name + newNode.desc + "String_Node_Str");
            classNode.methods.add(newNode);
            break;
          }
        }
        for (        MethodNode mn : classNode.methods) {
          if (mn.name.equals("String_Node_Str") || mn.name.equals("String_Node_Str") || (mn.name.equals("String_Node_Str") && mn.desc.equals("String_Node_Str"))) {
            Iterator<AbstractInsnNode> i=mn.instructions.iterator();
            while (i.hasNext()) {
              AbstractInsnNode in=i.next();
              if (in.getOpcode() == Opcodes.INVOKESPECIAL) {
                MethodInsnNode n=(MethodInsnNode)in;
                if (n.name.equals("String_Node_Str") || (n.name.equals("String_Node_Str") && n.desc.equals("String_Node_Str"))) {
                  log(n.name + n.desc + "String_Node_Str");
                  mn.instructions.insertBefore(n,new MethodInsnNode(Opcodes.INVOKEVIRTUAL,n.owner,n.name,n.desc,false));
                  mn.instructions.remove(in);
                  break;
                }
              }
            }
          }
        }
      }
      ClassWriter writer=new ClassWriter(ClassWriter.COMPUTE_MAXS);
      classNode.accept(writer);
      return writer.toByteArray();
    }
  }
 catch (  Throwable t) {
  }
  return basicClass;
}

Fixed version (ground truth):
@Override public byte[] transform(String name,String transformedName,byte[] basicClass){
  if (basicClass == null)   return basicClass;
  try {
    if (transformedName != null && privateToPublicMethods.containsKey(transformedName)) {
      ClassNode classNode=new ClassNode();
      ClassReader classReader=new ClassReader(basicClass);
      classReader.accept(classNode,0);
      for (      publicLine Set : privateToPublicMethods.get(transformedName)) {
        makePublic(classNode,Set);
      }
      if (transformedName.equals("String_Node_Str")) {
        for (        MethodNode mn : classNode.methods) {
          if (mn.name.equals("String_Node_Str") || (mn.name.equals("String_Node_Str") && mn.desc.equals("String_Node_Str"))) {
            MethodNode newNode=new MethodNode(Opcodes.ACC_PUBLIC,"String_Node_Str",mn.desc,mn.signature,new String[0]);
            newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD,0));
            newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD,1));
            newNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL,classNode.name,mn.name,mn.desc));
            newNode.instructions.add(new InsnNode(Opcodes.RETURN));
            log(newNode.name + newNode.desc + "String_Node_Str");
            classNode.methods.add(newNode);
            break;
          }
        }
        for (        MethodNode mn : classNode.methods) {
          if (mn.name.equals("String_Node_Str") || mn.name.equals("String_Node_Str") || (mn.name.equals("String_Node_Str") && mn.desc.equals("String_Node_Str"))) {
            Iterator<AbstractInsnNode> i=mn.instructions.iterator();
            while (i.hasNext()) {
              AbstractInsnNode in=i.next();
              if (in.getOpcode() == Opcodes.INVOKESPECIAL) {
                MethodInsnNode n=(MethodInsnNode)in;
                if (n.name.equals("String_Node_Str") || (n.name.equals("String_Node_Str") && n.desc.equals("String_Node_Str"))) {
                  log(n.name + n.desc + "String_Node_Str");
                  mn.instructions.insertBefore(n,new MethodInsnNode(Opcodes.INVOKEVIRTUAL,n.owner,n.name,n.desc));
                  mn.instructions.remove(in);
                  break;
                }
              }
            }
          }
        }
      }
      ClassWriter writer=new ClassWriter(ClassWriter.COMPUTE_MAXS);
      classNode.accept(writer);
      return writer.toByteArray();
    }
  }
 catch (  Throwable t) {
  }
  return basicClass;
}