NSExeption on macos, Linux works.

The following code throws an NSExeption on my mac but has no error on Linux. 
The code is in my main method and when I comment out one of the two paragraphs everything works fine. The problem is, I don't understand why I am not getting an NSException when I only use the QQuickView part. But getting it with both the engine and view.

{{
…
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
if (engine.rootObjects().isEmpty())
return -1;

QQuickView view;
view.setResizeMode(QQuickView::SizeRootObjectToView);
view.setSource(QUrl("qrc:///app.qml"));
view.show();}}

Exception:
{{2018-02-06 15:31:16.933 VideoWall[42635:2301468] *** Terminating app due to uncaught exception 'NSImageCacheException', reason: 'Cannot lock focus on image <NSImage 0x7f9daff18730 Size=

Reps=(
)>, because it is size zero.'

• • • First throw call stack:
      (
      0 CoreFoundation 0x00007fff4dc9afcb __exceptionPreprocess + 171
      1 libobjc.A.dylib 0x00007fff7493cc76 objc_exception_throw + 48
      2 CoreFoundation 0x00007fff4dd2c9ed +[NSException raise:format:] + 205
      3 AppKit 0x00007fff4b3550ad -[NSImage _lockFocusOnRepresentation:rect:context:hints:flipped:] + 316
      4 AppKit 0x00007fff4b354f6a __51-[NSImage lockFocusWithRect:context:hints:flipped:]_block_invoke + 82
      5 AppKit 0x00007fff4b3188e4 -[NSImage _usingBestRepresentationForRect:context:hints:body:] + 164
      6 AppKit 0x00007fff4b354f0f -[NSImage lockFocusWithRect:context:hints:flipped:] + 162
      7 AppKit 0x00007fff4b3b92d2 -[NSImage lockFocusFlipped:] + 123
      8 AppKit 0x00007fff4b53c978 -[NSApplication _setApplicationIconImage:setDockImage:] + 272
      9 AppKit 0x00007fff4b61260f -[NSApplication _iconImage] + 71
      10 AppKit 0x00007fff4b915f06 -[NSWindowTab image] + 169
      11 AppKit 0x00007fff4b9160f6 -[NSWindowTab tabBarItem] + 219
      12 AppKit 0x00007fff4b5de840 -[NSWindow(NSWindowTabbing) _tabBarItem] + 48
      13 AppKit 0x00007fff4ba57732 -[NSWindowStackController _addSyncedTabBarItemForWindow:atIndex:] + 60
      14 AppKit 0x00007fff4ba55886 -[NSWindowStackController insertWindow:atIndex:] + 628
      15 AppKit 0x00007fff4ba555fb -[NSWindowStackController addWindow:] + 437
      16 AppKit 0x00007fff4ba5fe01 ___findControllerForIdentifier_block_invoke + 202
      17 AppKit 0x00007fff4b6122c6 -[NSApplication enumerateWindowsWithOptions:usingBlock:] + 560
      18 AppKit 0x00007fff4ba567be _findControllerForIdentifier + 1146
      19 AppKit 0x00007fff4ba5630d +[NSWindowStackController canJoinExistingStackForWindow:] + 64
      20 AppKit 0x00007fff4b323bac -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 354
      21 AppKit 0x00007fff4b3239cf -[NSWindow orderWindow:relativeTo:] + 169
      22 AppKit 0x00007fff4b3c75c1 -[NSWindow makeKeyAndOrderFront:] + 110
      23 libqcocoa.dylib 0x000000010c59a5d4 qt_plugin_instance + 49556
      24 QtGui 0x0000000109d326e9 _ZN7QWindow10setVisibleEb + 1113
      25 VideoWall 0x0000000108df228b main + 491
      26 libdyld.dylib 0x00007fff7552c115 start + 1
      27 ??? 0x0000000000000001 0x0 + 1
      )
      libc++abi.dylib: terminating with uncaught exception of type NSException
      The program has unexpectedly finished.}}