Unloading a Canvas with renderTarget of Canvas.Image causes crash

import QtQuick 2.0

Item {
    width: 500; height: 500

    Loader { id: loader }

    focus: true
    Keys.onReturnPressed: loader.source = "simple.qml"
    Keys.onSpacePressed: loader.source = ""
}

import QtQuick 2.0


Canvas {
    id: canvas
    width: 200; height: 200

   renderTarget: Canvas.Image         // if this is removed, it does not crash

    onPaint: {
        var context = canvas.getContext('2d')
        context.fillRect(50, 50, 100, 100)
    }

}

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000
0x00007fff865c16e3 in glDeleteTextures ()
(gdb) bt
#0  0x00007fff865c16e3 in glDeleteTextures ()
#1  0x00000001009a736b in QSGPlainTexture::~QSGPlainTexture (this=0x1059c1e10) at qsgtexture.cpp:404
#2  0x00000001027612da in qDeleteInEventHandler (o=0x1059c1e10) at qobject.cpp:4029
#3  0x000000010276cf49 in QObject::event (this=0x1059c1e10, e=0x1059c2090) at qobject.cpp:1098
#4  0x00000001043a1bfa in QApplicationPrivate::notify_helper (this=0x105921b70, receiver=0x1059c1e10, e=0x1059c2090) at qapplication.cpp:4193
#5  0x00000001043a21dd in QApplication::notify (this=0x7fff5fbff5b8, receiver=0x1059c1e10, e=0x1059c2090) at qapplication.cpp:3610
#6  0x000000010273e871 in QCoreApplication::notifyInternal (this=0x7fff5fbff5b8, receiver=0x1059c1e10, event=0x1059c2090) at qcoreapplication.cpp:826
#7  0x000000010014e0a9 in QCoreApplication::sendEvent (receiver=0x1059c1e10, event=0x1059c2090) at qcoreapplication.h:207
#8  0x000000010273f08f in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x10591f410) at qcoreapplication.cpp:1468
#9  0x000000010273f375 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at qcoreapplication.cpp:1338
#10 0x0000000102d671ef in QCoreApplication::sendPostedEvents () at qcoreapplication.h:212
#11 0x0000000102d66922 in QWindowSystemInterface::sendWindowSystemEvents (eventDispatcher=0x105921db0, flags=@0x7fff5fbfdb10) at qwindowsysteminterface_qpa.cpp:296
#12 0x0000000107f9b42a in processPostedEvents (d=0x106058a00, blockSendPostedEvents=false) at qcocoaeventdispatcher.mm:985
#13 0x0000000107f9a91e in QCocoaEventDispatcherPrivate::postedEventsSourcePerformCallback (info=0x106058a00) at qcocoaeventdispatcher.mm:1020
#14 0x00007fff892ca241 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ ()
#15 0x00007fff892c9aad in __CFRunLoopDoSources0 ()
#16 0x00007fff892f08d9 in __CFRunLoopRun ()
#17 0x00007fff892f0216 in CFRunLoopRunSpecific ()
#18 0x00007fff8a7d34ff in RunCurrentEventLoopInMode ()
#19 0x00007fff8a7dac21 in ReceiveNextEventCommon ()
#20 0x00007fff8a7daaae in BlockUntilNextEventMatchingListInMode ()
#21 0x00007fff81d4f191 in _DPSNextEvent ()
#22 0x00007fff81d4ea95 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#23 0x00007fff81d4b3d6 in -[NSApplication run] ()
#24 0x0000000107f9bec8 in QCocoaEventDispatcher::processEvents (this=0x105921db0, flags=@0x7fff5fbff2d8) at qcocoaeventdispatcher.mm:577
#25 0x0000000102738935 in QEventLoop::processEvents (this=0x7fff5fbff400, flags=@0x7fff5fbff360) at qeventloop.cpp:149
#26 0x0000000102738dd0 in QEventLoop::exec (this=0x7fff5fbff400, flags=@0x7fff5fbff428) at qeventloop.cpp:225
#27 0x000000010273f51a in QCoreApplication::exec () at qcoreapplication.cpp:1093
#28 0x0000000102d7dba3 in QGuiApplication::exec () at qguiapplication.cpp:481
#29 0x00000001043a6232 in QApplication::exec () at qapplication.cpp:3494
#30 0x000000010000a4a1 in main (argc=2, argv=0x7fff5fbffb40) at main.cpp:533