Fix crash when invalidating a layout while rearranging

Queue the invalidations and upates while rearranging and
apply them after. If we do them during, we can delete the
items being arranged, leading to a crash.

Change-Id: Ic3fe25c52afd1c8d36644f3cf7e3377ba3bec9c1
Task-number: QTBUG-44139
Reviewed-by: Jan Arve Sæther <jan-arve.saether@theqtcompany.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/auto/controls/data/tst_gridlayout.qml b/tests/auto/controls/data/tst_gridlayout.qml
index e3d9a66b..8b271f02 100644
--- a/tests/auto/controls/data/tst_gridlayout.qml
+++ b/tests/auto/controls/data/tst_gridlayout.qml
@@ -924,5 +924,36 @@ Item {
 
             layout.destroy()
         }
+
+        Component {
+            id: layout_invalidateWhileRearranging_Component
+
+            GridLayout {
+                columns: 1
+                Rectangle {
+                    height: 50
+                    Layout.fillWidth: true
+                    color: 'blue'
+                }
+
+                Rectangle {
+                    height: 50
+                    Layout.fillWidth: true
+                    color: 'red'
+                    onYChanged: {
+                        visible = false;
+                    }
+                }
+            }
+        }
+
+        function test_invalidateWhileRearranging_QTBUG_44139()
+        {
+            var layout = layout_invalidateWhileRearranging_Component.createObject(container)
+
+            waitForRendering(layout);
+            verify(layout.children[1].visible == false);
+            layout.destroy()
+        }
     }
 }