bluetoothd crashed with SIGSEGV in __GI__IO_wsetb()

[ernsteiswuerfel]

Bluetooth crashinfo displayed shortly after login. This happens repeatedly.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: bluez 5.37-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-22.40-powerpc-smp 4.4.8
Uname: Linux 4.4.0-22-powerpc-smp ppc
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: powerpc
Date: Sat Jun 11 11:26:29 2016
ExecutablePath: /usr/lib/bluetooth/bluetoothd
InstallationDate: Installed on 2015-09-16 (269 days ago)
InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Alpha powerpc (20150827)
InterestingModules: rfcomm bnep btusb bluetooth
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 003 Device 002: ID 05ac:0215 Apple, Inc. Internal Keyboard/Trackpad (ISO)
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 003: ID 05ac:8207 Apple, Inc.
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdline: /usr/lib/bluetooth/bluetoothd
ProcEnviron:
 LANG=de_AT.UTF-8
 LANGUAGE=de_AT:de
 PATH=(custom, no user)
ProcKernelCmdLine: root=UUID=e7580396-741d-4923-8a8a-50db1b938df3 ro rootflags=subvol=@ quiet splash
Signal: 11
SourcePackage: bluez
StacktraceTop:
 __GI__IO_wsetb (f=f@entry=0x204b7ca0 <_IO_stdout_>, b=b@entry=0x0, eb=eb@entry=0x0, a=a@entry=0) at wgenops.c:105
 _IO_unbuffer_all () at genops.c:918
 _IO_cleanup () at genops.c:960
 __run_exit_handlers (status=0, listp=<optimized out>, run_list_atexit=run_list_atexit@entry=true) at exit.c:95
 __GI_exit (status=<optimized out>) at exit.c:104
Title: bluetoothd crashed with SIGSEGV in __GI__IO_wsetb()
UpgradeStatus: Upgraded to xenial on 2016-05-08 (35 days ago)
UserGroups:

hciconfig:
 hci0: Type: BR/EDR Bus: USB
  BD Address: 00:14:51:95:FF:B4 ACL MTU: 384:8 SCO MTU: 64:8
  UP RUNNING
  RX bytes:534 acl:0 sco:0 events:27 errors:0
  TX bytes:612 acl:0 sco:0 commands:26 errors:0