reproduction Flowgraph for https://github.com/gnuradio/gnuradio/issues/5090

CMakeLists.txt

# GNU Radio C++ Flow Graph CMakeLists.txt
#
# Title: generate c++ variables
# Author: Marcus Müller, Solomon B Stoner
# GNU Radio version: v3.11.0.0git-649-gd7cdf222


cmake_minimum_required(VERSION 3.8)
set(CMAKE_CXX_STANDARD 14)

project(repro5090)

find_package(Gnuradio "3.11" COMPONENTS
    blocks
    fec
    fft
    filter
    analog
    digital
    dtv
    audio
    channels
    pdu
    iio
    qtgui
    trellis
    uhd
    uhd UHD 4.0 RFNoC
    video-sdl
    vocoder
    wavelet
    zeromq
    network
    soapy
)




add_executable(repro5090 repro5090.cpp)
target_link_libraries(repro5090
    gnuradio::gnuradio-blocks
    gnuradio::gnuradio-filter
)

repro5090.grc

options:
  parameters:
    author: "Marcus M\xFCller, Solomon B Stoner"
    catch_exceptions: 'True'
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: 2021,2024
    description: ''
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: no_gui
    hier_block_src_path: '.:'
    id: repro5090
    max_nouts: '0'
    output_language: cpp
    placement: (0,0)
    qt_qss_theme: ''
    realtime_scheduling: ''
    run: 'True'
    run_command: '{python} -u {filename}'
    run_options: run
    sizing_mode: fixed
    thread_safe_setters: ''
    title: generate c++ variables
    window_size: (1000,1000)
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 8]
    rotation: 0
    state: enabled

blocks:
- name: rrc
  id: variable_rrc_filter_taps
  parameters:
    alpha: '0.35'
    comment: ''
    gain: '1.0'
    ntaps: '21'
    samp_rate: samp_rate
    sym_rate: samp_rate/4
    value: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [320, 12.0]
    rotation: 0
    state: enabled
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: '32000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [208, 28.0]
    rotation: 0
    state: enabled
- name: blocks_null_sink_0
  id: blocks_null_sink
  parameters:
    affinity: ''
    alias: ''
    bus_structure_sink: '[[0,],]'
    comment: ''
    num_inputs: '1'
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [480, 200.0]
    rotation: 0
    state: enabled
- name: blocks_null_source_0
  id: blocks_null_source
  parameters:
    affinity: ''
    alias: ''
    bus_structure_source: '[[0,],]'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_outputs: '1'
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [56, 200.0]
    rotation: 0
    state: enabled
- name: fft_filter_xxx_0
  id: fft_filter_xxx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    decim: '1'
    maxoutbuf: '0'
    minoutbuf: '0'
    nthreads: '1'
    samp_delay: '0'
    taps: ''
    type: ccc
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [256, 180.0]
    rotation: 0
    state: enabled

connections:
- [blocks_null_source_0, '0', fft_filter_xxx_0, '0']
- [fft_filter_xxx_0, '0', blocks_null_sink_0, '0']

metadata:
  file_format: 1
  grc_version: v3.11.0.0git-649-gd7cdf222

repro5090.hpp

#ifndef REPRO5090_HPP
#define REPRO5090_HPP
/********************
GNU Radio C++ Flow Graph Header File

Title: generate c++ variables
Author: Marcus Müller, Solomon B Stoner
GNU Radio version: v3.11.0.0git-649-gd7cdf222
********************/

/********************
** Create includes
********************/
#include <gnuradio/top_block.h>
#include <gnuradio/filter/firdes.h>
#include <gnuradio/blocks/null_sink.h>
#include <gnuradio/blocks/null_source.h>
#include <gnuradio/filter/fft_filter_ccc.h>



using namespace gr;



class repro5090 {

private:


    filter::fft_filter_ccc::sptr fft_filter_xxx_0;
    blocks::null_source::sptr blocks_null_source_0;
    blocks::null_sink::sptr blocks_null_sink_0;


// Variables:
    long samp_rate = 32000;
    std::vector<float> rrc = filter::firdes::root_raised_cosine(1.0, samp_rate,samp_rate/4, 0.35, 21);

public:
    top_block_sptr tb;
    repro5090();
    ~repro5090();

    long get_samp_rate () const;
    void set_samp_rate(long samp_rate);
    std::vector<float> get_rrc () const;
    void set_rrc(std::vector<float> rrc);

};


#endif

repro5090.svg