#1129719 gr-air-modes: ImportError: generic_type: type "preamble" referenced unknown base type "gr::block"

Package:
gr-air-modes
Source:
gr-air-modes
Description:
Gnuradio Mode-S/ADS-B radio
Submitter:
Arnaud Rebillout
Date:
2026-03-05 02:13:02 UTC
Severity:
normal
#1129719#5
Date:
2026-03-05 02:09:44 UTC
From:
To:
Dear Maintainer,

here's what I get if I try to display the usage message of modes_rx:

```
# modes_rx -h
Traceback (most recent call last):
  File "/usr/bin/modes_rx", line 26, in <module>
    import air_modes
  File "/usr/lib/python3/dist-packages/air_modes/__init__.py", line 31, in <module>
    from .air_modes_python import *
ImportError: generic_type: type "preamble" referenced unknown base type "gr::block"
```

This can be easily reproduced in a clean Debian Sid chroot or container.

Note that I don't use the tool myself, however we provide this tool in
some Kali Linux metapackage, and it's our QA that caught that. I don't
know for how long it's been like this.

Best,

Arnaud