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[Erich Eickmeyer <1759441@xxxxxxxxxxxxxxxxxx>]

This is a known issue with the Calf plugins at the time of this bug
report. Since then, the issue has been resolved in newer versions of
Calf plugins. However, the Ardour developers have stated that the cannot
and will not support Calf plugins, and the calf-ladspa plugins (which
were never to be released for anything except lmms) have been known to
crash Ardour. Again, these situations have been resolved.

** Information type changed from Private to Public

** Package changed: ardour (Ubuntu) => calf (Ubuntu)

** Changed in: calf (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1759441

Title:
  ardour-5.12.0 crashed with SIGSEGV in dsp::zero<float>()

Status in calf package in Ubuntu:
  Fix Released

Bug description:
  ardour always crash with calf studio

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: ardour 1:5.12.0-3
  ProcVersionSignature: Ubuntu 4.15.0-12.13-lowlatency 4.15.7
  Uname: Linux 4.15.0-12-lowlatency x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Tue Mar 27 22:14:19 2018
  ExecutablePath: /usr/lib/ardour5/ardour-5.12.0
  InstallationDate: Installed on 2018-03-17 (11 days ago)
  InstallationMedia: Ubuntu-Studio 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180315)
  JournalErrors:
   -- Logs begin at Fri 2018-03-16 21:59:16 -03, end at Tue 2018-03-27 22:14:19 -03. --
   mar 27 21:24:10 hostname kernel: Couldn't get size: 0x800000000000000e
   mar 27 21:24:39 hostname spice-vdagent[1145]: Cannot access vdagent virtio channel /dev/virtio-ports/com.redhat.spice.0
   mar 27 21:24:41 hostname pulseaudio[1242]: [pulseaudio] pid.c: Daemon already running.
   mar 27 21:24:41 hostname pulseaudio[1203]: [pulseaudio] backend-ofono.c: Failed to register as a handsfree audio agent with ofono: org.freedesktop.DBus.Error.ServiceUnknown: The name org.ofono was not provided by any .service files
  ProcCmdline: /usr/lib/ardour5/ardour-5.12.0
  SegvAnalysis:
   Segfault happened at: 0x7f3a0dc12964 <_ZN12calf_plugins12audio_moduleINS_16limiter_metadataEE13process_sliceEjj+148>:	movss  %xmm1,-0x4(%rdx)
   PC (0x7f3a0dc12964) ok
   source "%xmm1" ok
   destination "-0x4(%rdx)" (0x350cd88e0) not located in a known VMA region (needed writable region)!
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: ardour
  StacktraceTop:
   calf_plugins::audio_module<calf_plugins::limiter_metadata>::process_slice(unsigned int, unsigned int) () from /usr/lib/ladspa/calf.so
   calf_plugins::lv2_wrapper<calf_plugins::limiter_audio_module>::cb_instantiate(_LV2_Descriptor const*, double, char const*, _LV2_Feature const* const*) () from /usr/lib/lv2/calf.lv2/calf.so
   lilv_plugin_instantiate () from /usr/lib/liblilv-0.so.0
   ARDOUR::LV2Plugin::init(void const*, long) () from /usr/lib/ardour5/libardour.so.3
   ARDOUR::LV2Plugin::LV2Plugin(ARDOUR::AudioEngine&, ARDOUR::Session&, void const*, long) () from /usr/lib/ardour5/libardour.so.3
  Title: ardour-5.12.0 crashed with SIGSEGV in calf_plugins::audio_module<calf_plugins::limiter_metadata>::process_slice()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dip lpadmin plugdev sambashare sudo

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