mutter crashed with SIGSEGV in meta_screen_free()

[Dan]

...

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: mutter 3.14.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
Uname: Linux 3.19.0-10-generic x86_64
ApportVersion: 2.16.2-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Sat Mar 28 19:46:00 2015
ExecutablePath: /usr/bin/mutter
InstallationDate: Installed on 2015-03-28 (0 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Beta amd64 (20150326)
ProcCmdline: mutter
SegvAnalysis:
 Segfault happened at: 0x7fe5b61229d7 <meta_screen_free+7>: mov 0x18(%rdi),%rbp
 PC (0x7fe5b61229d7) ok
 source "0x18(%rdi)" (0x00000018) not located in a known VMA region (needed readable region)!
 destination "%rbp" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: mutter
StacktraceTop:
 meta_screen_free () from /usr/lib/libmutter.so.0
 meta_display_close () from /usr/lib/libmutter.so.0
 meta_display_open () from /usr/lib/libmutter.so.0
 meta_run () from /usr/lib/libmutter.so.0
 ?? ()
Title: mutter crashed with SIGSEGV in meta_screen_free()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 meta_screen_free (screen=0x0, timestamp=12998407) at core/screen.c:800
 meta_display_close (display=0x2b08e00, timestamp=12998407) at core/display.c:1102
 meta_display_open () at core/display.c:902
 meta_run () at core/main.c:470
 main (argc=1, argv=0x7ffff1784238) at core/mutter.c:85