Unregister unit cache hook when destroying the plugin singleton

At the point the plugin is actually unloaded the hook turns into a
dangling pointer.

Fixes: QTBUG-71387
Change-Id: Ib8ccee3f9a86d4700fbea7e87c666cd8f30f71e4
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
 

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmlenginecleanup/tst_qqmlenginecleanup.cpp b/tests/auto/qml/qqmlenginecleanup/tst_qqmlenginecleanup.cpp
index b9cede6d13..690db30838 100644
--- a/tests/auto/qml/qqmlenginecleanup/tst_qqmlenginecleanup.cpp
+++ b/tests/auto/qml/qqmlenginecleanup/tst_qqmlenginecleanup.cpp
@@ -44,6 +44,7 @@ public:
 private slots:
     void test_qmlClearTypeRegistrations();
     void test_valueTypeProviderModule(); // QTBUG-43004
+    void test_customModuleCleanup();
 };
 
 // A wrapper around QQmlComponent to ensure the temporary reference counts
@@ -168,6 +169,23 @@ void tst_qqmlenginecleanup::test_valueTypeProviderModule()
     QVERIFY(noDangling);
 }
 
+void tst_qqmlenginecleanup::test_customModuleCleanup()
+{
+    for (int i = 0; i < 5; ++i) {
+        qmlClearTypeRegistrations();
+
+        QQmlEngine engine;
+        engine.addImportPath(QT_TESTCASE_BUILDDIR);
+
+        QQmlComponent component(&engine);
+        component.setData("import CustomModule 1.0\nModuleType {}", QUrl());
+        QCOMPARE(component.status(), QQmlComponent::Ready);
+
+        QScopedPointer<QObject> object(component.create());
+        QVERIFY(!object.isNull());
+    }
+}
+
 QTEST_MAIN(tst_qqmlenginecleanup)
 
 #include "tst_qqmlenginecleanup.moc"