Crash when using DropShadow (of a Canvas)

Thread 0:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff6c71ad2e _kernelrpc_mach_vm_deallocate_trap + 10
1   libsystem_kernel.dylib        	0x00007fff6c71c399 mach_vm_deallocate + 64
2   libsystem_malloc.dylib        	0x00007fff6c79d866 mvm_deallocate_pages + 70
3   libsystem_malloc.dylib        	0x00007fff6c79bf46 free_large + 877
4   com.apple.AMDRadeonX6000GLDriver	0x000000010e109d71 ATISCFreeSysMem + 12
5   libSC.dylib                   	0x00007fff26ec8b04 Arena::Release() + 52
6   libSC.dylib                   	0x00007fff26edd318 Compiler::Compile(ILProgram*) + 4872
7   libSC.dylib                   	0x00007fff26edd8d9 Compiler::CompileShader(unsigned char*, unsigned char*, unsigned int const*) + 777
8   libSC.dylib                   	0x00007fff27551c7a SCCompileShader + 298
9   com.apple.AMDRadeonX6000GLDriver	0x000000010e11ffbd glrAMD_GFX10_SCCompileHwVertexShader + 1255
10  com.apple.AMDRadeonX6000GLDriver	0x000000010e1565b1 glrAMD_Hwl_CompileVertexShader + 221
11  com.apple.AMDRadeonX6000GLDriver	0x000000010e1011e3 glrUpdateCtxSysVertexProgram + 1136
12  com.apple.AMDRadeonX6000GLDriver	0x000000010e126e0c gpusLoadCurrentPipelinePrograms + 4309
13  com.apple.AMDRadeonX6000GLDriver	0x000000010e105875 gldUpdateDispatch + 1987
14  GLEngine                      	0x00007fff3d0f6fc3 gleDoDrawDispatchCore + 693
15  GLEngine                      	0x00007fff3d0d6f91 glDrawElements_ACC_Exec + 306
16  org.qt-project.QtQuick        	0x0000000105f2029e QSGBatchRenderer::Renderer::renderUnmergedBatch(QSGBatchRenderer::Batch const*) + 1166 (qsgbatchrenderer.cpp:3243)
17  org.qt-project.QtQuick        	0x0000000105f24f00 QSGBatchRenderer::Renderer::renderBatches() + 2688
18  org.qt-project.QtQuick        	0x0000000105f272d6 QSGBatchRenderer::Renderer::render() + 3430 (qsgbatchrenderer.cpp:4365)
19  org.qt-project.QtQuick        	0x0000000105f0d3cd QSGRenderer::renderScene(QSGBindable const&) + 541 (qsgrenderer.cpp:229)
20  org.qt-project.QtQuick        	0x0000000105f0d19a QSGRenderer::renderScene(unsigned int) + 58 (qsgrenderer.cpp:218)
21  org.qt-project.QtQuick        	0x0000000105f732e7 QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) + 71 (qsgdefaultrendercontext.cpp:230)
22  org.qt-project.QtQuick        	0x0000000105fd827f QQuickWindowPrivate::renderSceneGraph(QSize const&, QSize const&) + 975 (qquickwindow.cpp:619)
23  org.qt-project.QtQuick        	0x0000000105f60936 QSGGuiThreadRenderLoop::renderWindow(QQuickWindow*) + 3830 (qsgrenderloop.cpp:687)
24  org.qt-project.QtQuick        	0x0000000105fdf9e2 QQuickWindow::event(QEvent*) + 834 (qquickwindow.cpp:1834)
25  org.qt-project.QtCore         	0x00000001074e7bf8 QCoreApplicationPrivate::notify_helper(QObject*, QEvent*) + 88 (qcoreapplication.cpp:1226)
26  org.qt-project.QtCore         	0x00000001074e7854 QCoreApplication::notifyInternal2(QObject*, QEvent*) + 212 (qcoreapplication.cpp:1063)
27  org.qt-project.QtGui          	0x0000000106508bb5 QPlatformWindow::deliverUpdateRequest() + 69 (qplatformwindow.cpp:790)
28  libqcocoa.dylib               	0x000000010b76f456 QCocoaWindow::deliverUpdateRequest() + 182 (qcocoawindow.mm:1547)
29  libqcocoa.dylib               	0x000000010b75b053 QCocoaScreen::deliverUpdateRequests() + 627 (qcocoascreen.mm:520)

//	DropShadow {
//		anchors.fill: rect
//		source: rect
//		radius: 15
//		samples: 1 + (radius * 2)
//		verticalOffset: 10
//		color: "lightsteelblue"
//	}