TextArea: Detach the flickable when it is deleted

When the flickable is deleted before the TextArea is (which can happen
when it is a child of a ScrollView) then we need to make sure that the
TextArea no longer keeps a reference to the Flickable object.

Fixes: QTBUG-93958
Change-Id: I1745065370718e60bc459192e15eae0e1ba36231
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
(cherry picked from commit 4cba29c38cb1b610bf896130050b6c14b7e10c71)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/auto/controls/data/tst_scrollview.qml b/tests/auto/controls/data/tst_scrollview.qml
index 3e645ebf..0e8b0835 100644
--- a/tests/auto/controls/data/tst_scrollview.qml
+++ b/tests/auto/controls/data/tst_scrollview.qml
@@ -193,6 +193,15 @@ TestCase {
             }
         }
     }
+    Component {
+        id: scrollableTextAreaWithSibling
+        ScrollView {
+            Item {
+            }
+            TextArea {
+            }
+        }
+    }
 
     function test_scrollBars() {
         var control = createTemporaryObject(scrollView, testCase, {width: 200, height: 200})
@@ -508,6 +517,12 @@ TestCase {
         compare(control.contentHeight, flickable.contentHeight)
     }
 
+    function test_textAreaWithSibling() {
+        // Checks that it does not crash when the ScrollView is deleted
+        var control = createTemporaryObject(scrollableTextAreaWithSibling, testCase)
+        verify(control)
+    }
+
     Component {
         id: zeroSizedContentItemComponent
         ScrollView {