First Use of Workspace Switcher: compiz crashed with SIGSEGV in assign_to_own()

[Buzzing Robot]

First click on workspace switcher icon in Launcher after a clean install of the 20 July Utopic daily failed to produce the expected spread of workspaces and instead triggered approx. 30 seconds of disk activity followed by an Apport message that compiz had crashed.

On the second the switcher performed as expected.

I've seen the same behavior on every Unity release since 12.04.

ThinkPad W530, Intel HD4000, 1920x1080.

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: unity 7.3.0+14.10.20140711-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-4.9-generic 3.16.0-rc5
Uname: Linux 3.16.0-4-generic x86_64
ApportVersion: 2.14.4-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Jul 20 21:11:18 2014
Disassembly: => 0x7f0000000001: Cannot access memory at address 0x7f0000000001
ExecutablePath: /usr/bin/compiz
InstallationDate: Installed on 2014-07-21 (0 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140720)
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f0000000001: Cannot access memory at address 0x7f0000000001
 PC (0x7f0000000001) not located in a known VMA region (needed executable region)!
SegvReason: executing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? ()
 CompAction::initiate() const () from /usr/lib/libcompiz_core.so.ABI-20140123
 unity::MultiActionList::Initiate(std::string const&, std::vector<CompOption, std::allocator<CompOption> > const&, int) const () from /usr/lib/compiz/libunityshell.so
 unity::MultiActionList::InitiateAll(std::vector<CompOption, std::allocator<CompOption> > const&, int) const () from /usr/lib/compiz/libunityshell.so
 unity::PluginAdapter::InitiateExpo() () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in CompAction::initiate()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 assign_to_own (f=..., this=0x7fff46239a90) at /usr/include/boost/function/function_template.hpp:909
 function3 (f=..., this=0x7fff46239a90) at /usr/include/boost/function/function_template.hpp:749
 function (f=..., this=0x7fff46239a90) at /usr/include/boost/function/function_template.hpp:1089
 CompAction::initiate (this=<optimized out>) at /build/buildd/compiz-0.9.11+14.10.20140707/src/action.cpp:360

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.