Have no idea just what happened.
I got this dmp file just before mp3tag crashed on manjaro linux using bottles (instead of wine) to run mp3tag:
Operating System: Manjaro Linux
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.12-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 8 × AMD Ryzen 7 3750H with Radeon Vega Mobile Gfx
Memory: 13.6 GiB of RAM
Graphics Processor: AMD Radeon Vega 10 Graphics
Manufacturer: BESSTAR TECH LIMITED
Product Name: UM700
Here are some general infos about possible causes:
E.g.: which MP3tag version was this?
What kind of files were you treating?
Are they OK? (Really tested, not just "playable")
Does MP3tag crash every time or just with some files?
A good test is always the access rights and to avoid simultaneous to the files.
I mean that it could be that the files have such access rights that they cannot be accessed properly by MP3tag due to insufficient privileges.
Simultaneous access by other programs could be players that are open at the same time, or the conversion program has not finished yet or an indexer just happened to find that file interesting.
Does the crash happen every time with the same file?
Does it happen always with the same type of files?
Does it happen with any type of files?
Does it happen only with new files?
Does it happen only with converted files?
Do you happen to have other m4b files and do they work or do they lead to a crash?
You see that you have to look for local causes in your environment - esp. as this is a litte stranger to most other users.