SSL Heap modify after free

This bug affects 5.1 Alpha (this selection is not available in drop-down)

When using a QNetworkAccessManager to do a HTTP request over SSL the app will crash on exit due to double freeing of a SSL Context resource.

Debug output:
Debugging starts
QSslSocket: cannot resolve TLSv1_1_client_method
QSslSocket: cannot resolve TLSv1_2_client_method
QSslSocket: cannot resolve TLSv1_1_server_method
QSslSocket: cannot resolve TLSv1_2_server_method
HEAP[crashtest.exe]: HEAP: Free Heap block 2142c80 modified at 2142f1c after it was freed
Debugging has finished

Stack trace:

0 QAtomicOpsBySize<4>::deref qatomic_msvc.h 309 0x5685cc09
1 QBasicAtomicInteger<int>::deref qbasicatomic.h 153 0x5685cbf0
2 QSharedDataPointer<QSslConfigurationPrivate>::~QSharedDataPointer<QSslConfigurationPrivate> qshareddata.h 87 0x569250cb
3 QSslConfiguration::~QSslConfiguration qsslconfiguration.cpp 141 0x5692432f
4 QSslContext::~QSslContext qsslcontext.cpp 75 0x56940788
5 QSslContext::`scalar deleting destructor' Qt5Networkd 0x56936e6f
6 QtSharedPointer::CustomDeleter<QSslContext,QtSharedPointer::NormalDeleter>::execute qsharedpointer_impl.h 196 0x56936e37
7 QtSharedPointer::ExternalRefCountWithCustomDeleter<QSslContext,QtSharedPointer::NormalDeleter>::deleter qsharedpointer_impl.h 218 0x56936ce5
8 QtSharedPointer::ExternalRefCountData::destroy qsharedpointer_impl.h 158 0x5686d9a3
9 QSharedPointer<QSslContext>::deref qsharedpointer_impl.h 451 0x5686da78
10 QSharedPointer<QSslContext>::deref qsharedpointer_impl.h 444 0x5686d813
11 QSharedPointer<QSslContext>::~QSharedPointer<QSslContext> qsharedpointer_impl.h 312 0x5686d52f
12 QHttpNetworkConnectionPrivate::~QHttpNetworkConnectionPrivate qhttpnetworkconnection.cpp 114 0x56867180
13 QHttpNetworkConnectionPrivate::`scalar deleting destructor' Qt5Networkd 0x5686cfef
14 QScopedPointerDeleter<QObjectData>::cleanup qscopedpointer.h 62 0x5826a1f6
15 QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> >::~QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> > qscopedpointer.h 98 0x58269c2a
16 QObject::~QObject qobject.cpp 863 0x5825e7eb
17 QHttpNetworkConnection::~QHttpNetworkConnection qhttpnetworkconnection.cpp 1148 0x5686b4f9
18 QNetworkAccessCachedHttpConnection::~QNetworkAccessCachedHttpConnection Qt5Networkd 0x568b649a
19 QNetworkAccessCachedHttpConnection::`scalar deleting destructor' Qt5Networkd 0x568b644f
20 QNetworkAccessCachedHttpConnection::dispose qhttpthreaddelegate.cpp 170 0x568b641d
21 QNetworkAccessCache::clear qnetworkaccesscache.cpp 127 0x56881e47
22 QNetworkAccessCache::~QNetworkAccessCache qnetworkaccesscache.cpp 114 0x56881d98
23 QNetworkAccessCache::`scalar deleting destructor' Qt5Networkd 0x56882d5f
24 qThreadStorage_deleteData<QNetworkAccessCache> qthreadstorage.h 94 0x568b6a77
25 QThreadStorage<QNetworkAccessCache *>::deleteData qthreadstorage.h 137 0x568b6a3e
26 QThreadStorageData::finish qthreadstorage.cpp 203 0x57fb6e40
27 QThreadPrivate::finish qthread_win.cpp 365 0x57fb9fef
28 QThreadPrivate::start qthread_win.cpp 349 0x57fb9f10
29 _beginthreadex MSVCR100D 0x586ca273
30 _beginthreadex MSVCR100D 0x586ca204
31 BaseThreadInitThunk kernel32 0x74ac33aa
32 __RtlUserThreadStart ntdll32 0x77289ef2
33 _RtlUserThreadStart ntdll32 0x77289ec5

Attached small example project. This error can be trapped by using gflags.exe -p /enable crashtest.exe /full