totem crashed with SIGSEGV in pipe_surface_reference()

[Amr Ibrahim]

Steps:
1. Play a video from the channel 'Apple Movie Trailers'
2. Go back while the video is playing
3. Select another video from the same channel

Totem hanged and crashed while trying to play the second video over the first one from the same channel.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: totem 3.18.1-1ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CrashCounter: 1
CurrentDesktop: Unity
Date: Sun Jan 29 10:27:45 2017
ExecutablePath: /usr/bin/totem
InstallationDate: Installed on 2016-04-26 (277 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
LogAlsaMixer:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined
   Playback channels: Mono
   Mono: Playback [on]
ProcCmdline: totem
SegvAnalysis:
 Segfault happened at: 0x7f99464af0c9: mov 0x1d8(%rbx),%rsi
 PC (0x7f99464af0c9) ok
 source "0x1d8(%rbx)" (0x000001d8) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: totem
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
 ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
 ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
 glXMakeCurrentReadSGI () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
Title: totem crashed with SIGSEGV in glXMakeCurrentReadSGI()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 pipe_surface_reference (surf=0x0, ptr=0x1d8) at ../../../../../src/gallium/auxiliary/util/u_inlines.h:109
 dri_destroy_buffer (dPriv=0x55f8a3bb12c0) at ../../../../../src/gallium/state_trackers/dri/dri_drawable.c:171
 dri_put_drawable (pdp=pdp@entry=0x55f8a3bb12c0) at ../../../../../../src/mesa/drivers/dri/common/dri_util.c:615
 dri_put_drawable (pdp=0x55f8a3bb12c0) at ../../../../../../src/mesa/drivers/dri/common/dri_util.c:598
 driUnbindContext (pcp=0x55f8a225ca60) at ../../../../../../src/mesa/drivers/dri/common/dri_util.c:583