"5.10.0 xcb" ()
Screen: "DVI-I-1"
0x000004b4 "" 1920x1200+0+0


.......
      
  0x03200610 "" 508x333+710+450
    0x03200611 "" 500x300+4+29
      0x06e00005 "QTBUG-56893 5.10.0 xcb" 500x300+0+0 <-- Example Main window
  0x03200613 "" 208x99+846+498 <-------- Fails for WM frame/wrapper of dialog
    0x03200614 "" 200x66+4+29
      0x06e0000d "QTBUG-56893 showInfoOnStack" 200x66+0+0 <-- QDialog
  0x0320000f "" 1920x27+0+1173
    0x03200010 "" 1920x27+0+0
     
....................

Fail 0x4b4 0x3200613
QXcbConnection: XCB error: 3 (BadWindow), sequence: 976, resource id: 52430355, major code: 40 (TranslateCoords), minor code: 0