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[Apport retracing service <1725504@xxxxxxxxxxxxxxxxxx>]

** Attachment added: "ThreadStacktrace.txt"
   https://bugs.launchpad.net/bugs/1725504/+attachment/4980476/+files/ThreadStacktrace.txt

** Attachment removed: "CoreDump.gz"
   https://bugs.launchpad.net/bugs/1725504/+attachment/4980463/+files/CoreDump.gz

** Changed in: qtractor (Ubuntu)
   Importance: Undecided => Medium

** Summary changed:

- qtractor crashed with SIGSEGV in g_rec_mutex_lock()
+ qtractor crashed with SIGSEGV in g_rec_mutex_get_impl()

** Tags removed: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1725504

Title:
  qtractor crashed with SIGSEGV in g_rec_mutex_get_impl()

Status in qtractor package in Ubuntu:
  New

Bug description:
  On a fresh Ubuntu Studio 17.10 64-bit, Qtractor 0.8.3 is crashing each
  time when trying to select-add, for example, a DSSI plugin installed
  by default. Usage only MIDI with ALSA. It was more or less the same
  bad story with 0.7.1 under US 16.04.x. So, it's still unusable!

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: qtractor 0.8.3-1
  ProcVersionSignature: Ubuntu 4.13.0-16.19-lowlatency 4.13.4
  Uname: Linux 4.13.0-16-lowlatency x86_64
  ApportVersion: 2.20.7-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.387
  CrashCounter: 1
  CurrentDesktop: XFCE
  Date: Fri Oct 20 22:22:54 2017
  ExecutablePath: /usr/bin/qtractor
  LiveMediaBuild: Ubuntu-Studio 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
  ProcCmdline: /usr/bin/qtractor
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7fd7071ffea4 <g_rec_mutex_lock+4>:	mov    (%rdi),%rbx
   PC (0x7fd7071ffea4) ok
   source "(%rdi)" (0x1200000000) not located in a known VMA region (needed readable region)!
   destination "%rbx" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: qtractor
  StacktraceTop:
   g_rec_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_static_rec_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   fluid_settings_setnum () from /usr/lib/x86_64-linux-gnu/libfluidsynth.so.1
   ?? () from /usr/lib/dssi/fluidsynth-dssi.so
   ?? ()
  Title: qtractor crashed with SIGSEGV in g_rec_mutex_lock()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dip lpadmin plugdev sambashare sudo

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