unity-applications-daemon crashed with SIGSEGV in dee_sequence_model_free_row()

[Fo2adZz]

Ubuntu 12.04 beta 1 just poped up a window saying an error happened and needs to report it

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-lens-applications 5.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.94-0ubuntu1
Architecture: amd64
Date: Sun Mar 4 19:47:39 2012
ExecutablePath: /usr/lib/unity-lens-applications/unity-applications-daemon
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120303)
ProcCmdline: /usr/lib/unity-lens-applications/unity-applications-daemon
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7fe7c1d9ab8d <g_variant_unref+13>: mov 0x24(%rdi),%eax
 PC (0x7fe7c1d9ab8d) ok
 source "0x24(%rdi)" (0x00000044) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-lens-applications
StacktraceTop:
 g_variant_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/libdee-1.0.so.4
 ?? () from /usr/lib/libdee-1.0.so.4
 ?? () from /usr/lib/libunity.so.9
 g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: unity-applications-daemon crashed with SIGSEGV in g_variant_unref()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 ?? () at /build/buildd/glib2.0-2.31.20/./glib/gvariant-core.c:583 from /tmp/tmpS40PBP/lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
 dee_sequence_model_free_row (self=<optimized out>, iter=0x206c0a0) at dee-sequence-model.c:981
 dee_sequence_model_remove (self=0x201a180, iter_=0x206c0a0) at dee-sequence-model.c:482
 unity_results_synchronizer_on_row_removed (iter=0x1ea9c60, provider=0x1ec4440, self=0x2024540) at unity-lens-tools.c:1228