mate-panel crashed with SIGSEGV in g_slist_remove_all()

[Daniel Skorupka]

Tried to play a song. Played it... sort of... and then mate-panel gave an error message.

Issue may be related to vlc media player.
Set VLC as preferred application for audio playback,
Went to play a .WAV file ripped from a CD.
This .WAV file was stored in a hardware RAID 1 of 3 TB capacity. This array is all formated BTRFS.
Upon clicking this music file two instances VLC began playing, the same file, sudibly out of synch.
Only one VLC instance had any GUI.
Closed the one with a gui by clicking quit.
The other instance presisted.
This daemon instance of VLC will continued playing for several seconds.
Then an error message popped up.
The GIU was still working for the duration.
I am not using compiz.

Hardware.
Asrock 970 Extreme 3 R2.0, latest BIOS-UEFI
AMD FX-6300, stock clock.
8GB low latency ddr3-1600 RAM
XFX Radeon R9 285A DD edition, down to stock clock
Samnsung 850 Pro 128GB
Aforemetioned RAID 1.

Description: Ubuntu Vivid Vervet (development branch)
Release: 15.04

3.19 generic kernel, amd-64-microcode, linux-firmware-nonfree, fglrx, and ubuntu restricted extras in use.
ALSA firmware package not in use (yet?).
This machine is intended as a video editing workstation, hence the closed source codecs and Tonga GPU.

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: mate-panel 1.8.1+dfsg1-3
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
CurrentDesktop: MATE
Date: Sat Mar 14 12:36:38 2015
ExecutablePath: /usr/bin/mate-panel
InstallationDate: Installed on 2015-03-14 (0 days ago)
InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Alpha amd64 (20150225)
ProcCmdline: mate-panel
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fb5e00477bc <g_slist_remove_all+44>: cmp %rbp,(%rdi)
 PC (0x7fb5e00477bc) ok
 source "%rbp" ok
 destination "(%rdi)" (0x7fffffff00000000) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: mate-panel
StacktraceTop:
 g_slist_remove_all () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 g_hash_table_foreach () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 gtk_rc_reset_styles () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
Title: mate-panel crashed with SIGSEGV in g_slist_remove_all()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1425341, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.