Fedora 29; audacity-freeworld-2.3.0-1.fc29.x86_64 from RPMFusion repository.
Steps to reproduce:
- Open MP3 file
- Select all
- Effect > Bass and Treble…
- Enter some random values
- Click “Start Playback”
- Click “Apply”
I’d love to paste my stacktrace but everytime I try I get “Sorry, you have been blocked” shown by Cloudflare.
Audacity 2.3.0 is for Windows and MacOS only. It should not have been packaged for the RPMFusion repository as a “release” package as 2.3.0 is “experimental” on Linux and known to have some serious issues (including the one that you describe).
See also: https://www.audacityteam.org/download/linux/
The current release version for Linux is Audacity 2.2.2.
The next release version for Linux will be Audacity 2.3.1, which is scheduled for January.