[libraries/kirigami-addons/fix/formradiodelegate-deferred] src/formcard: FormRadioDelegate: Avoid assigning null to a deferred property

Git commit 9a6e5a03d304c2c380606adf5d0ca8cf829027d5 by Linus Jahn.
Committed on 06/08/2026 at 00:22.
Pushed by lnj into branch 'fix/formradiodelegate-deferred'.

FormRadioDelegate: Avoid assigning null to a deferred property

contentItem is a deferred property of QQuickControl. Assigning null to it
makes Qt begin a deferred creation that is never completed, so every
FormRadioDelegate inside a destroyed dialog leaves an in-progress creation
behind and the engine warns on teardown:

  There are still "N" items in the process of being created at engine
  destruction.

Use a zero-sized item instead, which keeps the layout unchanged: the
implicit size and the indicator position are identical for both variants,
with the Basic style as well as with qqc2-desktop-style.

The underlying Qt bug is QTBUG-148846, fixed by
https://codereview.qt-project.org/c/qt/qtdeclarative/+/758142

M  +6    -1    src/formcard/FormRadioDelegate.qml

https://invent.kde.org/libraries/kirigami-addons/-/commit/9a6e5a03d304c2c380606adf5d0ca8cf829027d5

diff --git a/src/formcard/FormRadioDelegate.qml b/src/formcard/FormRadioDelegate.qml
index 0c44f068..5187ec8f 100644
--- a/src/formcard/FormRadioDelegate.qml
+++ b/src/formcard/FormRadioDelegate.qml
@@ -127,7 +127,12 @@ T.RadioDelegate {
                 enabled: root.enabled
                 checked: root.checked
 
-                contentItem: null // Remove right margin
+                // A zero-sized item rather than null: assigning null to a deferred
+                // property makes Qt leak an in-progress creation (QTBUG-148846).
+                contentItem: Item {
+                    implicitWidth: 0
+                    implicitHeight: 0
+                }
                 spacing: 0
 
                 topPadding: 0