Crash @ libthread_db.so.1 in Ubuntu

Crash @ libthread_db.so.1 in Ubuntu

OS: Ubuntu 22.04.1 LTS

Both of 2 PCs reproduce:

$ vlc
VLC media player 3.0.18 Vetinari (revision 3.0.18-0-ge9eceaed4d)
[000055e266037b10] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
Qt: Session management error: Could not open network socket
Fontconfig warning: FcPattern object width does not accept value [75 100)
Segmentation fault (core dumped)

$ gdb vlc
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
need to run as root or suid
[Inferior 1 (process 23727) exited with code 01]

$ sudo vlc
mkdir: cannot create directory '/run/user/0': Permission denied
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
Authorization required, but no authorization protocol specified
Error: unable to open display :0
VLC is not supposed to be run as root. Sorry.
If you need to use real-time priorities and/or privileged TCP ports
you can use /snap/vlc/3078/usr/bin/vlc-wrapper (make sure it is Set-UID root and
cannot be run by non-trusted users first).

changed the description

changed the description

Edited issue to use code blocks.

added Platform::GNU/Linux Version::3.0.x labels

Need symbolic stack trace.

Don't understand. Bing "symbolic stack trace" and get nothing. An example please?

If the core has been dumped (as the message says it) you can analyze the coredump directly after vlc's crash with gdb -c /path/to/core vlc (don't forget to call ulimit -c unlimited before running vlc)

The path of cores follow the content of whatever is returned by cat /proc/sys/kernel/core_pattern

Then use the gdb thread apply all bt command for the complete stack trace.

Finally I uninstall snap vlc (3.0.18) and install apt://vlc (3.0.16) which i ignored. It works surprisingly. Thanks a lot for your instructions which I've recorded on my note as ways of analysing core dumped.

assigned to @heapmotion

added Status::needs more info label

closed