QPulseAudioInput may crash after calling close()

#0 QObject::d_func (sender=0x0, m=0xb69a3228, local_signal_index=0, argv=0x0)
at ../../include/QtCore/../../src/corelib/kernel/qobject.h:125
#1 QMetaObject::activate (sender=0x0, m=0xb69a3228, local_signal_index=0, 
argv=0x0) at kernel/qobject.cpp:3195
#2 0xb68da447 in QIODevice::readyRead (this=0x0)
at .moc/release-shared/moc_qiodevice.cpp:91
#3 0xb588cd79 in InputPrivate::trigger (this=0x0) at qaudioinput_pulse.cpp:593
#4 0xb588cb0a in QPulseAudioInput::deviceReady (this=0x81babb0)
at qaudioinput_pulse.cpp:544
#5 0xb588caa1 in QPulseAudioInput::userFeed (this=0x81babb0)
at qaudioinput_pulse.cpp:533
#6 0xb588ce7b in QPulseAudioInput::qt_metacall (this=0x81babb0, 
_c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x81d7358)
at ../../../build/Debug/qtmedia_pulse/moc/moc_qaudioinput_pulse.cpp:74
#7 0xb687844a in QMetaObject::metacall (object=0x81babb0, 
cl=QMetaObject::WriteProperty, idx=7, argv=0x81d7358)
at kernel/qmetaobject.cpp:237
#8 0xb6883796 in QMetaCallEvent::placeMetaCall (this=0x81d4f20, 
object=0x81babb0) at kernel/qobject.cpp:534
#9 0xb68848c2 in QObject::event (this=0x81babb0, e=0x0)
at kernel/qobject.cpp:1211
#10 0xb6872023 in QCoreApplicationPrivate::notify_helper (this=0x81acfc0, 
receiver=0x81babb0, event=0x81d4f20) at kernel/qcoreapplication.cpp:867
#11 0xb68726b3 in QCoreApplication::notify (this=0xbfb4d4a8, 
receiver=0x81babb0, event=0x81d4f20) at kernel/qcoreapplication.cpp:813
#12 0xb687277b in QCoreApplication::notifyInternal (this=0xbfb4d4a8, 
receiver=0x81babb0, event=0x81d4f20) at kernel/qcoreapplication.cpp:732
#13 0xb687597c in QCoreApplication::sendEvent (receiver=0x0, event_type=0, 
data=0x81accb0)
at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#14 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, 
data=0x81accb0) at kernel/qcoreapplication.cpp:1373
#15 0xb6875add in QCoreApplication::sendPostedEvents (receiver=0x0, 
event_type=0) at kernel/qcoreapplication.cpp:1266
#16 0xb68a1294 in QCoreApplication::sendPostedEvents (s=0x81b0bb0)
at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#17 postEventSourceDispatch (s=0x81b0bb0)
at kernel/qeventdispatcher_glib.cpp:277
#18 0xb60dc305 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#19 0xb60dffe8 in ?? () from /lib/libglib-2.0.so.0
#20 0xb60e01c8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#21 0xb68a0d85 in QEventDispatcherGlib::processEvents (this=0x81acde0, 
flags=...) at kernel/qeventdispatcher_glib.cpp:415
#22 0xb6875d71 in QCoreApplication::processEvents (flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
)
at kernel/qcoreapplication.cpp:924
#23 0xb588b595 in ~QPulseAudioInput (this=0x81babb0, 
__in_chrg=<value optimized out>) at qaudioinput_pulse.cpp:148
#24 0xb7725868 in ~QAudioInput (this=0x81ba790, 
__in_chrg=<value optimized out>) at audio/qaudioinput.cpp:210
#25 0x08049cb1 in QScopedPointerDeleter<QAudioInput>::cleanup (
pointer=0x81ba790) at /usr/include/qt4/QtCore/qscopedpointer.h:62
#26 0x08049c4f in ~QScopedPointer (this=0xbfb4cf04, 
__in_chrg=<value optimized out>)
at /usr/include/qt4/QtCore/qscopedpointer.h:100
#27 0x08049bb0 in Object::run (this=0xbfb4d4a0) at main_crash.cpp:43
#28 0x0804973e in Object::qt_metacall (this=0xbfb4d4a0, 
_c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x81b1620) at main_crash.moc:75
#29 0xb687844a in QMetaObject::metacall (object=0xbfb4d4a0, 
cl=QMetaObject::WriteProperty, idx=5, argv=0x81b1620)
at kernel/qmetaobject.cpp:237
#30 0xb6883796 in QMetaCallEvent::placeMetaCall (this=0x81b9e80, 
object=0xbfb4d4a0) at kernel/qobject.cpp:534
#31 0xb68848c2 in QObject::event (this=0xbfb4d4a0, e=0x0)
at kernel/qobject.cpp:1211
#32 0xb6872023 in QCoreApplicationPrivate::notify_helper (this=0x81acfc0, 
receiver=0xbfb4d4a0, event=0x81b9e80) at kernel/qcoreapplication.cpp:867
#33 0xb68726b3 in QCoreApplication::notify (this=0xbfb4d4a8, 
receiver=0xbfb4d4a0, event=0x81b9e80) at kernel/qcoreapplication.cpp:813
#34 0xb687277b in QCoreApplication::notifyInternal (this=0xbfb4d4a8, 
receiver=0xbfb4d4a0, event=0x81b9e80) at kernel/qcoreapplication.cpp:732
#35 0xb687597c in QCoreApplication::sendEvent (receiver=0x0, event_type=0, 
data=0x81accb0)
at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#36 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, 
data=0x81accb0) at kernel/qcoreapplication.cpp:1373
#37 0xb6875add in QCoreApplication::sendPostedEvents (receiver=0x0, 
event_type=0) at kernel/qcoreapplication.cpp:1266
#38 0xb68a1294 in QCoreApplication::sendPostedEvents (s=0x81b0bb0)
at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#39 postEventSourceDispatch (s=0x81b0bb0)
at kernel/qeventdispatcher_glib.cpp:277
#40 0xb60dc305 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#41 0xb60dffe8 in ?? () from /lib/libglib-2.0.so.0
#42 0xb60e01c8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#43 0xb68a0d85 in QEventDispatcherGlib::processEvents (this=0x81acde0, 
flags=...) at kernel/qeventdispatcher_glib.cpp:415
#44 0xb6871229 in QEventLoop::processEvents (this=0xbfb4d414, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
)
at kernel/qeventloop.cpp:149
#45 0xb68716aa in QEventLoop::exec (this=0xbfb4d414, flags=...)
at kernel/qeventloop.cpp:201
#46 0xb6875b9f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#47 0x08049607 in main (argc=1, argv=0xbfb4d5c4) at main_crash.cpp:54