Stacktrace:
#0 0xb64b798c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
No symbol table info available.
#1 0xb066283c in unity::shell::scopes::ScopeInterface::openScope (this=this@entry=0xf8ddc8, _t1=_t1@entry=0x2014aa0) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/obj-arm-linux-gnueabihf/src/Unity/moc_ScopeInterface.cpp:785
_a = {0x0, 0xbeb0bb5c}
#2 0xb064a262 in scopes_ng::Scope::executeCannedQuery (this=this@entry=0xf8ddc8, query=..., allowDelayedActivation=allowDelayedActivation@entry=true) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/src/Unity/scope.cpp:289
meta_sptr = std::shared_ptr (count 3, weak 0) 0x12c0a9c
__PRETTY_FUNCTION__ = "void scopes_ng::Scope::executeCannedQuery(const unity::scopes::CannedQuery&, bool)"
scopeId = {static null = {<No data fields>}, d = 0x2016150}
searchString = {static null = {<No data fields>}, d = 0x2021b50}
departmentId = {static null = {<No data fields>}, d = 0x2013af0}
scope = 0x2014aa0
#3 0xb064a5ea in scopes_ng::Scope::performQuery (this=0xf8ddc8, cannedQuery=...) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/src/Unity/scope.cpp:950
q = {p = std::unique_ptr<unity::scopes::internal::CannedQueryImpl> containing 0x2020888}
__PRETTY_FUNCTION__ = "virtual void scopes_ng::Scope::performQuery(const QString&)"
#4 0xb064a7b4 in scopes_ng::Scope::activateUri (this=this@entry=0xf8ddc8, uri=...) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/src/Unity/scope.cpp:1260
url = {d = 0x1e60408}
__PRETTY_FUNCTION__ = "void scopes_ng::Scope::activateUri(const QString&)"
#5 0xb06406e4 in scopes_ng::PreviewStack::widgetTriggered (this=<optimized out>, widgetId=..., actionId=..., data=...) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/src/Unity/previewstack.cpp:188
widgetData = 0x1f62228
previewModel = <optimized out>
__PRETTY_FUNCTION__ = "void scopes_ng::PreviewStack::widgetTriggered(const QString&, const QString&, const QVariantMap&)"
#6 0xb64b7a86 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
No symbol table info available.
#7 0xb0662452 in unity::shell::scopes::PreviewModelInterface::triggered (this=<optimized out>, _t1=..., _t2=..., _t3=...) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/obj-arm-linux-gnueabihf/src/Unity/moc_PreviewModelInterface.cpp:230
_a = {0x0, 0xbeb0bfe0, 0xbeb0bff8, 0x201dd40}
#8 0xb06648fa in unity::shell::scopes::PreviewModelInterface::qt_metacall (this=0x1f67db8, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbeb0bf90) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/obj-arm-linux-gnueabihf/src/Unity/moc_PreviewModelInterface.cpp:163
No locals.
#9 0xb6b02784 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Qml.so.5
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
StacktraceAddressSignature: /usr/bin/unity8-dash:11:/usr/lib/arm-linux-gnueabihf/libQt5Core.so.5.3.2+1f698c:/usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/libUnity-qml.so+5d83c:/usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/libUnity-qml.so+45262:/usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/libUnity-qml.so+455ea:/usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/libUnity-qml.so+457b4:/usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/libUnity-qml.so+3b6e4:/usr/lib/arm-linux-gnueabihf/libQt5Core.so.5.3.2+1f6a86:/usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/libUnity-qml.so+5d452:/usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/libUnity-qml.so+5f8fa:/usr/lib/arm-linux-gnueabihf/libQt5Qml.so.5.3.2+15a784
StacktraceTop:
QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
unity::shell::scopes::ScopeInterface::openScope (this=this@entry=0xf8ddc8, _t1=_t1@entry=0x2014aa0) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/obj-arm-linux-gnueabihf/src/Unity/moc_ScopeInterface.cpp:785
scopes_ng::Scope::executeCannedQuery (this=this@entry=0xf8ddc8, query=..., allowDelayedActivation=allowDelayedActivation@entry=true) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/src/Unity/scope.cpp:289
scopes_ng::Scope::performQuery (this=0xf8ddc8, cannedQuery=...) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/src/Unity/scope.cpp:950
scopes_ng::Scope::activateUri (this=this@entry=0xf8ddc8, uri=...) at /build/buildd/unity-scopes-shell-0.5.4+15.04.20150126/src/Unity/scope.cpp:1260