Program: 53674
Project: 53674
Buggy source:
private void addTProtocolInterceptors(ThriftPluginConfig config,String tProtocolClassName){
  final boolean traceThriftClient=config.traceThriftClient();
  final boolean traceThriftProcessor=config.traceThriftProcessor();
  final String targetClassName=tProtocolClassName;
  transformTemplate.transform(targetClassName,new TransformCallback(){
    @Override public byte[] doInTransform(    Instrumentor instrumentor,    ClassLoader loader,    String className,    Class<?> classBeingRedefined,    ProtectionDomain protectionDomain,    byte[] classfileBuffer) throws InstrumentException {
      final InstrumentClass target=instrumentor.getInstrumentClass(loader,className,classfileBuffer);
      if (traceThriftClient) {
        final InstrumentMethod writeFieldStop=target.getDeclaredMethod("String_Node_Str");
        if (writeFieldStop != null) {
          String interceptor="String_Node_Str";
          writeFieldStop.addInterceptor(interceptor);
        }
      }
      if (traceThriftProcessor) {
        target.addField(ServerMarkerFlagFieldAccessor.class.getName());
        final InstrumentMethod readFieldBegin=target.getDeclaredMethod("String_Node_Str");
        if (readFieldBegin != null) {
          String interceptor="String_Node_Str";
          readFieldBegin.addInterceptor(interceptor);
        }
        final List<InstrumentMethod> readTTypes=target.getDeclaredMethods(MethodFilters.name("String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str"));
        if (readTTypes != null) {
          String tTypeCommonInterceptor="String_Node_Str";
          for (          InstrumentMethod readTType : readTTypes) {
            if (readTType != null) {
              readTType.addInterceptor(tTypeCommonInterceptor);
            }
          }
        }
        final InstrumentMethod readMessageEnd=target.getDeclaredMethod("String_Node_Str");
        if (readMessageEnd != null) {
          String interceptor="String_Node_Str";
          readMessageEnd.addInterceptor(interceptor);
        }
        target.addField(AsyncMarkerFlagFieldAccessor.class.getName());
        final InstrumentMethod readMessageBegin=target.getDeclaredMethod("String_Node_Str");
        if (readMessageBegin != null) {
          String interceptor="String_Node_Str";
          readMessageBegin.addInterceptor(interceptor);
        }
      }
      return target.toBytecode();
    }
  }
);
}

Fixed version (ground truth):
private void addTProtocolInterceptors(ThriftPluginConfig config,String tProtocolClassName){
  final boolean traceThriftClient=config.traceThriftClient();
  final boolean traceThriftProcessor=config.traceThriftProcessor();
  final String targetClassName=tProtocolClassName;
  transformTemplate.transform(targetClassName,new TransformCallback(){
    @Override public byte[] doInTransform(    Instrumentor instrumentor,    ClassLoader loader,    String className,    Class<?> classBeingRedefined,    ProtectionDomain protectionDomain,    byte[] classfileBuffer) throws InstrumentException {
      final InstrumentClass target=instrumentor.getInstrumentClass(loader,className,classfileBuffer);
      if (traceThriftClient) {
        final InstrumentMethod writeFieldStop=target.getDeclaredMethod("String_Node_Str");
        if (writeFieldStop != null) {
          String interceptor="String_Node_Str";
          writeFieldStop.addInterceptor(interceptor);
        }
      }
      if (traceThriftProcessor) {
        target.addField(ThriftConstants.FIELD_ACCESSOR_SERVER_MARKER_FLAG);
        final InstrumentMethod readFieldBegin=target.getDeclaredMethod("String_Node_Str");
        if (readFieldBegin != null) {
          String interceptor="String_Node_Str";
          readFieldBegin.addInterceptor(interceptor);
        }
        final List<InstrumentMethod> readTTypes=target.getDeclaredMethods(MethodFilters.name("String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str"));
        if (readTTypes != null) {
          String tTypeCommonInterceptor="String_Node_Str";
          for (          InstrumentMethod readTType : readTTypes) {
            if (readTType != null) {
              readTType.addInterceptor(tTypeCommonInterceptor);
            }
          }
        }
        final InstrumentMethod readMessageEnd=target.getDeclaredMethod("String_Node_Str");
        if (readMessageEnd != null) {
          String interceptor="String_Node_Str";
          readMessageEnd.addInterceptor(interceptor);
        }
        target.addField(ThriftConstants.FIELD_ACCESSOR_ASYNC_MARKER_FLAG);
        final InstrumentMethod readMessageBegin=target.getDeclaredMethod("String_Node_Str");
        if (readMessageBegin != null) {
          String interceptor="String_Node_Str";
          readMessageBegin.addInterceptor(interceptor);
        }
      }
      return target.toBytecode();
    }
  }
);
}