Loading Guitarix plugins crashes Ardour

[catbrained]

Loading a Guitarix plugin (LV2) in Ardour makes Ardour crash. The crash happens 100% of the time I load one of the plugins.
Tried with the Guitarix tuner and Gx Amplifier X. Ardour works fine otherwise, and non-Guitarix plugins work fine.

OS: Nix OS
Ardour version: 9.2.0
Guitarix version: 0.47.0

Ardour startup output:

ardour9
WARNING: Your system has a limit for maximum amount of locked memory!
         This might cause Ardour to run out of memory before your system runs
         out of memory. You can view the memory limit with 'ulimit -l', and it
         is normally controlled by /etc/security/limits.conf

WARNING: Could not check your glib-2.0 for mutex locking atomic operations.

Ardour9.2.0 (built using 9.2 and GCC version 15.2.0)
Ardour: [INFO]: Your system is configured to limit Ardour to 524288 open files
Ardour: [INFO]: Loading system configuration file /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/etc/ardour9/system_config
Ardour: [INFO]: Loading user configuration file /home/linda/.config/ardour9/config
Ardour: [INFO]: CPU vendor: AuthenticAMD
Ardour: [INFO]: AVX capable processor
Ardour: [INFO]: AVX with FMA capable processor
Ardour: [INFO]: CPU brand: AMD Ryzen 7 5800H with Radeon Graphics         
Ardour: [INFO]: Using AVX and FMA optimized routines
Ardour: [INFO]: Loading plugin meta data file /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/share/ardour9/plugin_metadata/plugin_tags
Ardour: [INFO]: Loading plugin statistics file /home/linda/.config/ardour9/plugin_metadata/plugin_stats
Ardour: [INFO]: add_lrdf_data '/home/linda/.config/ardour9/rdf:/nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/share/ardour9/rdf:/usr/local/share/ladspa/rdf:/usr/share/ladspa/rdf'
Ardour: [INFO]: Loading default ui configuration file /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/etc/ardour9/default_ui_config
Ardour: [INFO]: Loading user ui configuration file /home/linda/.config/ardour9/ui_config
Ardour: [INFO]: Loading 470 MIDI patches from /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/share/ardour9/patchfiles
Ardour: [INFO]: Loading color file /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/share/ardour9/themes/dark-ardour.colors
Ardour: [INFO]: Loading ui configuration file /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/etc/ardour9/clearlooks.rc
Ardour: [INFO]: Loading bindings from /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/etc/ardour9/ardour.keys
Loading ui configuration file /nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/etc/ardour9/clearlooks.rc
Found nothing along /home/linda/.config/ardour9/templates:/nix/store/jx2isfm2jvbg19yhxrn0gp4bzdfkf5gc-ardour-9.2/share/ardour9/templates
Set cursor set to default
set_minsec_ruler_scale

and when I try to load the Guitarix tuner plugin for example:

lilv_world_get_unique(): warning: Subject <78b37> has multiple <http://www.w3.org/2000/01/rdf-schema#label> properties
lilv_plugin_get_unique_internal(): error: No value found for (78b37 http://www.w3.org/2000/01/rdf-schema#label ...) property
fish: Job 1, 'ardour9' terminated by signal SIGSEGV (Address boundary error)

Steps I took to reproduce:

1. Open Ardour
2. Create a track to record my guitar
3. Try to add a Guitarix plugin like Tuner or Amplifier X to the track
4. Ardour crashes

I'll see if I can figure out how to get some more useful output to debug this.

[brummer10]

Cant reproduce that here. Could you load other LV2 plugins without issues? Could you load Guitarix plugins in Guitarix or a other host (jalv, carla, Reaper, . . . )

what did you get from locate gx_amp.lv2/manifest.ttl

[catbrained]

Could you load other LV2 plugins without issues?

Yes.

Could you load Guitarix plugins in Guitarix or a other host (jalv, carla, Reaper, . . . )

Yes, it works in both Guitarix and carla.

what did you get from locate gx_amp.lv2/manifest.ttl

The manifest is in /etc/profiles/per-user/linda/lib/lv2/gx_amp.lv2/:

-r-xr-xr-x  2 root root  98352 Jan  1  1970 gx_amp_gui.so
-r-xr-xr-x  2 root root 995400 Jan  1  1970 gx_amp.so
-r--r--r-- 23 root root  13546 Jan  1  1970 gx_amp.ttl
-r--r--r-- 23 root root   1116 Jan  1  1970 manifest.ttl

Content of `manifest.ttl`:

#
# Copyright (C) 2012 Hermann Meyer, Andreas Degert, Pete Shorthose, Steve Poskitt
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# --------------------------------------------------------------------------
#
@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
<http://guitarix.sourceforge.net/plugins/gx_amp#GUITARIX>
    a lv2:Plugin ;
    lv2:binary <gx_amp.so>  ;
    rdfs:seeAlso <gx_amp.ttl>  .

[catbrained]

Okay, so I managed to use the plugin without crashing Ardour by opening it with the generic plugin GUI rather than Guitarix's own GUI. Will investigate further.