plymouthd crashed with SIGSEGV in ply_renderer_get_buffer_for_head()

[chielchiel]

ubuntu 15.04 on macbook air 11 inch early 2014 model

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: plymouth 0.9.0-0ubuntu9
ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
Uname: Linux 3.19.0-7-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.16.2-0ubuntu1
Architecture: amd64
Date: Tue Mar 3 01:20:17 2015
DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
ExecutablePath: /sbin/plymouthd
InstallationDate: Installed on 2015-02-22 (11 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150222)
MachineType: Apple Inc. MacBookAir6,1
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-7-generic.efi.signed root=UUID=4f640e50-a7ab-49b2-8884-a38f75022ed1 ro quiet splash vt.handoff=7
ProcCmdline: @sbin/plymouthd --mode=boot --attach-to-session
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-7-generic.efi.signed root=UUID=4f640e50-a7ab-49b2-8884-a38f75022ed1 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f91a8734b89 <ply_renderer_get_buffer_for_head+9>: mov 0x10(%rdi),%rax
 PC (0x7f91a8734b89) ok
 source "0x10(%rdi)" (0x4014000000000010) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: plymouth
StacktraceTop:
 ply_renderer_get_buffer_for_head () from /lib/x86_64-linux-gnu/libply-splash-core.so.4
 ply_pixel_display_draw_area () from /lib/x86_64-linux-gnu/libply-splash-core.so.4
 script_lib_sprite_refresh () from /lib/x86_64-linux-gnu/plymouth/script.so
 ?? () from /lib/x86_64-linux-gnu/plymouth/script.so
 ?? () from /lib/x86_64-linux-gnu/plymouth/script.so
TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
Title: plymouthd crashed with SIGSEGV in ply_renderer_get_buffer_for_head()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 01/07/2015
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA61.88Z.0099.B18.1501071032
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-35C1E88140C3E6CF
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir6,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-35C1E88140C3E6CF
dmi.modalias: dmi:bvnAppleInc.:bvrMBA61.88Z.0099.B18.1501071032:bd01/07/2015:svnAppleInc.:pnMacBookAir6,1:pvr1.0:rvnAppleInc.:rnMac-35C1E88140C3E6CF:rvrMacBookAir6,1:cvnAppleInc.:ct10:cvrMac-35C1E88140C3E6CF:
dmi.product.name: MacBookAir6,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[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 #1378284, 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.