Bug#1082749: Segmentation fault in jalv when no plugin is specified

[Michael Rogers <michael@briarproject.org>]

Package: jalv
Version: 1.6.6-1

When running jalv without any arguments, it crashes with a segmentation 
fault. Example:

$ jalv
Missing plugin URI, try lv2ls to list plugins
Exiting...
Segmentation fault

The same thing happens with jalv.gtk3 and jalv.qt5. If a plugin URI is 
given then the crash doesn't happen and the plugin works correctly.

I'm running Debian bookwork with a home directory copied from a previous 
bullseye installation.



Backtrace from gdb (using symbols from jalv-dbgsym):

(gdb) run
Starting program: /usr/bin/jalv
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Missing plugin URI, try lv2ls to list plugins
Exiting...

Program received signal SIGSEGV, Segmentation fault.
0x000055555555dd14 in zix_ring_free (ring=0x0) at ../src/zix/ring.c:83
83	../src/zix/ring.c: No such file or directory.
(gdb) bt
#0  0x000055555555dd14 in zix_ring_free (ring=0x0) at ../src/zix/ring.c:83
#1  0x000055555555abe9 in jalv_close (jalv=jalv@entry=0x7fffffffd830)
    at ../src/jalv.c:1276
#2  0x000055555555c6a5 in jalv_open (jalv=jalv@entry=0x7fffffffd830,
    argc=argc@entry=0x7fffffffd78c, argv=argv@entry=0x7fffffffd780)
    at ../src/jalv.c:1003
#3  0x0000555555558ab9 in main (argc=<optimized out>, argv=<optimized out>)
    at ../src/jalv.c:1329
(gdb)



Output of uname -a:

Linux greybook 6.1.0-25-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.106-3 
(2024-08-26) x86_64 GNU/Linux



Thanks for maintaining this package!

Cheers,
Michael

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