QNetworkReply::deleteLater() causes random crashes related to QNonContiguousByteDevice::~QNonContiguousByteDevice

(gdb) where
#0  0x004f2027 in QObjectData::dynamicMetaObject (this=0xb246c9a0) at kernel/qobject.cpp:189
#1  0x00d3a195 in QNetworkReplyHttpImpl::metaObject (this=0x21011d88) at .moc/debug-shared/moc_qnetworkreplyhttpimpl_p.cpp:333
#2  0x004f37ee in QObject::~QObject (this=0x21024cc8, __in_chrg=<value optimized out>) at kernel/qobject.cpp:852
#3  0x004089a7 in QNonContiguousByteDevice::~QNonContiguousByteDevice (this=0x21024cc8, __in_chrg=<value optimized out>) at io/qnoncontiguousbytedevice.cpp:148
#4  0x00d3bb84 in QNonContiguousByteDeviceThreadForwardImpl::~QNonContiguousByteDeviceThreadForwardImpl (this=0x21024cc8, __in_chrg=<value optimized out>)
    at .moc/debug-shared/../../access/qhttpthreaddelegate_p.h:209
#5  0x00d3bbbb in QNonContiguousByteDeviceThreadForwardImpl::~QNonContiguousByteDeviceThreadForwardImpl (this=0x21024cc8, __in_chrg=<value optimized out>)
    at .moc/debug-shared/../../access/qhttpthreaddelegate_p.h:209
#6  0x004f4fed in QObjectPrivate::deleteChildren (this=0x210059b8) at kernel/qobject.cpp:1764
#7  0x004f3871 in QObject::~QObject (this=0x21037d40, __in_chrg=<value optimized out>) at kernel/qobject.cpp:857
#8  0x00cc8cc2 in QHttpThreadDelegate::~QHttpThreadDelegate (this=0x21037d40, __in_chrg=<value optimized out>) at access/qhttpthreaddelegate.cpp:190
#9  0x00cc8cfb in QHttpThreadDelegate::~QHttpThreadDelegate (this=0x21037d40, __in_chrg=<value optimized out>) at access/qhttpthreaddelegate.cpp:190
#10 0x004fb80c in qDeleteInEventHandler (o=0x21037d40) at kernel/qobject.cpp:4158
#11 0x004f3b16 in QObject::event (this=0x21037d40, e=0x318c4b18) at kernel/qobject.cpp:1061
#12 0x004bdb9d in QCoreApplicationPrivate::notify_helper (this=0x98785c8, receiver=0x21037d40, event=0x318c4b18) at kernel/qcoreapplication.cpp:984
#13 0x004bd897 in QCoreApplication::notify (this=0xbfd15af4, receiver=0x21037d40, event=0x318c4b18) at kernel/qcoreapplication.cpp:929
#14 0x004bd7a1 in QCoreApplication::notifyInternal (this=0xbfd15af4, receiver=0x21037d40, event=0x318c4b18) at kernel/qcoreapplication.cpp:867
#15 0x004c129d in QCoreApplication::sendEvent (receiver=0x21037d40, event=0x318c4b18) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:232
#16 0x004be915 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xb24efb50) at kernel/qcoreapplication.cpp:1471
#17 0x004be3d7 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1329
#18 0x0052728f in postEventSourceDispatch (s=0x28a54d70) at kernel/qeventdispatcher_glib.cpp:279
#19 0x03fc4525 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#20 0x03fc8268 in ?? () from /lib/libglib-2.0.so.0
#21 0x03fc8449 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#22 0x00527a08 in QEventDispatcherGlib::processEvents (this=0x506aef48, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#23 0x004ba2a1 in QEventLoop::processEvents (this=0x1abf5248, flags=...) at kernel/qeventloop.cpp:136
#24 0x004ba569 in QEventLoop::exec (this=0x1abf5248, flags=...) at kernel/qeventloop.cpp:212
#25 0x002da361 in QThread::exec (this=0xb24edd50) at thread/qthread.cpp:507
#26 0x002da4f7 in QThread::run (this=0xb24edd50) at thread/qthread.cpp:574
#27 0x002e0953 in QThreadPrivate::start (arg=0xb24edd50) at thread/qthread_unix.cpp:345
#28 0x001a2919 in start_thread () from /lib/libpthread.so.0
#29 0x0090ad4e in clone () from /lib/libc.so.6
(gdb) quit