Program: 53679
Project: 53679
Buggy source:
@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):
@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();
}