Good day, I am new to the Debian bug system so maybe I am wrong regarding my next remark.
This bug that I filed causes 'GNURadio unable to start' and is now depending on a libspdlog1 bug 1015742 Looking at that bug it seems it isn't possible to reproduce after a distro reinstall. I guess now this GNURadio bug will also not be addressed, please change the status back to grave and have another look.