Last added blocks (FIR filter, SigGen, Window) crash gnuradio-companion

[Zlika]

Hello,
I have the following configuration (all compiled from sources) :

• GnuRadio 3.8.5
• UHD 4.2.0.0
• gr-ettus from latest commit (533babf)

When I try to add a RFNoC block under gnuradio-companion, all blocks are working ok except the latest added blocks: FIR Filter, SigGen, Window. When I try to add one of these blocks in a flowgraph, I have the following error, and the block does not appear:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/Application.py", line 410, in _handle_action
    flow_graph_update()
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/Application.py", line 122, in flow_graph_update
    fg.update()
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/flowgraph.py", line 205, in update
    self.create_labels()
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/flowgraph.py", line 508, in create_labels
    element.create_labels(cr)
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/block.py", line 169, in create_labels
    markups = [param.format_block_surface_markup()
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/block.py", line 169, in <listcomp>
    markups = [param.format_block_surface_markup()
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/param.py", line 173, in format_block_surface_markup
    self.pretty_print().replace('\n', ' '))
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/param.py", line 121, in pretty_print
    return self.truncate(value)
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/param.py", line 99, in truncate
    if len(string) > max_len:
TypeError: object of type 'int' has no len()
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/DrawingArea.py", line 220, in draw
    self._flow_graph.draw(cr)
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/flowgraph.py", line 535, in draw
    draw_element(cr)
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/block.py", line 261, in draw
    port.draw(cr)
  File "/usr/local/lib/python3.9/dist-packages/gnuradio/grc/gui/canvas/port.py", line 143, in draw
    cr.rectangle(*self._area)
TypeError: Context.rectangle() takes exactly 4 arguments (0 given)
(...)

Is there a known workaround?
Thanks.

[Zlika]

I think I've found a workaround. In ettus_rfnoc_fir_filter_block.yml, if I comment the line "options=[1, 2, ..." related to the num_chans parameter, the error disappears. It seems that "option" does not work with "int" type. Maybe another solution would be to use an "enum" type?