unity-system-compositor crashed with SIGSEGV in std::_Hashtable<std::shared_ptr<mir::input::Device>, std::shared_ptr<mir::input::Device>, std::allocator<std::shared_ptr<mir::input::Device> >, std::__detail::_Identity, std::equal_to<std::shared_ptr<mir::input::Device> >, std::hash<std::shared_ptr<mir::input::Device> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, true, true> >::~_Hashtable()

[bogz]

Ubuntu 16.04 on a VmWare vm, using VMware-tools-linux-10.0.5

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: unity-system-compositor 0.4.2+16.04.20160219.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-14.30-generic 4.4.5
Uname: Linux 4.4.0-14-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
Date: Wed Mar 16 13:16:44 2016
ExecutablePath: /usr/sbin/unity-system-compositor
GraphicsCard:
 VMware SVGA II Adapter [15ad:0405] (prog-if 00 [VGA controller])
   Subsystem: VMware SVGA II Adapter [15ad:0405]
InstallationDate: Installed on 2016-02-17 (33 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160217)
ProcCmdline: /usr/sbin/unity-system-compositor --file /run/lightdm-mir-0 --from-dm-fd 12 --to-dm-fd 21 --vt 8
ProcEnviron:

SegvAnalysis:
 Segfault happened at: 0x7f0d1cacd471: mov 0x10(%rax),%rax
 PC (0x7f0d1cacd471) ok
 source "0x10(%rax)" (0x7f0d0f616a70) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-system-compositor
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libmirserver.so.38
 ?? ()
 std::_Hashtable<std::shared_ptr<mir::input::Device>, std::shared_ptr<mir::input::Device>, std::allocator<std::shared_ptr<mir::input::Device> >, std::__detail::_Identity, std::equal_to<std::shared_ptr<mir::input::Device> >, std::hash<std::shared_ptr<mir::input::Device> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, true, true> >::~_Hashtable() ()
 usc::MirInputConfiguration::~MirInputConfiguration() ()
 std::_Sp_counted_ptr_inplace<usc::UnityInputService, std::allocator<usc::UnityInputService>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() ()
Title: unity-system-compositor crashed with SIGSEGV in std::_Hashtable<std::shared_ptr<mir::input::Device>, std::shared_ptr<mir::input::Device>, std::allocator<std::shared_ptr<mir::input::Device> >, std::__detail::_Identity, std::equal_to<std::shared_ptr<mir::input::Device> >, std::hash<std::shared_ptr<mir::input::Device> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, true, true> >::~_Hashtable()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

version.libdrm: libdrm2 2.4.67-1
version.lightdm: lightdm 1.17.6-0ubuntu1
version.mesa: libegl1-mesa-dev N/A

[Apport retracing service (apport)]

StacktraceTop:
 _M_release (this=0x7f0cf800d6e0) at /usr/include/c++/5/bits/shared_ptr_base.h:150
 ~__shared_count (this=<optimized out>, __in_chrg=<optimized out>) at /usr/include/c++/5/bits/shared_ptr_base.h:659
 ~__shared_ptr (this=<optimized out>, __in_chrg=<optimized out>) at /usr/include/c++/5/bits/shared_ptr_base.h:925
 ~shared_ptr (this=<optimized out>, __in_chrg=<optimized out>) at /usr/include/c++/5/bits/shared_ptr.h:93
 mir::input::DefaultDevice::~DefaultDevice (this=<optimized out>, __in_chrg=<optimized out>) at /build/mir-ZgPdOQ/mir-0.20.2+16.04.20160307/src/server/input/default_device.h:43

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alan Griffiths (alan-griffiths)]

AFAIK we've not seen these crashes on zesty which includes more recent versions of the associated projects. We're also not trying to support USC on xenial.