Don't use deprecated prop to get QJSEngine.

src/native/QmlNet/QmlNet/qml/NetJsValue.cpp

@@ -39,7 +39,7 @@ QSharedPointer<NetVariant> NetJSValue::call(const QSharedPointer<NetVariantList>
     if(parameters != nullptr) {
         for(int x = 0; x < parameters->count(); x++) {
             QSharedPointer<NetVariant> netVariant = parameters->get(x);
-            jsValueList.append(netVariant->toQJSValue(_jsValue.engine()));
+            jsValueList.append(netVariant->toQJSValue());
         }
     }
 
@@ -62,7 +62,7 @@ void NetJSValue::setProperty(const QString& propertyName, const QSharedPointer<N
 {
     QJSValue value = QJSValue::NullValue;
     if(variant != nullptr) {
-        value = variant->toQJSValue(_jsValue.engine());
+        value = variant->toQJSValue();
     }
     _jsValue.setProperty(propertyName, value);
 }
@@ -71,7 +71,7 @@ void NetJSValue::setItemAtIndex(quint32 arrayIndex, const QSharedPointer<NetVari
 {
     QJSValue value = QJSValue::NullValue;
     if(variant != nullptr) {
-        value = variant->toQJSValue(_jsValue.engine());
+        value = variant->toQJSValue();
     }
     _jsValue.setProperty(arrayIndex, value);
 }

src/native/QmlNet/QmlNet/qml/NetVariant.cpp

@@ -5,6 +5,7 @@
 #include <QDateTime>
 #include <QDebug>
 #include <QJSEngine>
+#include <QmlNet/qml/QQmlApplicationEngine.h>
 
 namespace
 {
@@ -238,18 +239,18 @@ QSharedPointer<NetVariant> NetVariant::fromQJSValue(const QJSValue& qJsValue)
     return result;
 }
 
-QJSValue NetVariant::toQJSValue(QJSEngine* jsEngine) const
+QJSValue NetVariant::toQJSValue() const
 {
     switch(getVariantType()) {
     case NetVariantTypeEnum_Object: {
         NetValue* netValue = NetValue::forInstance(getNetReference());
-        return jsEngine->newQObject(netValue);
+        return sharedQmlEngine()->newQObject(netValue);
     }
     case NetVariantTypeEnum_JSValue: {
         return getJsValue()->getJsValue();
     }
     default: {
-        return jsEngine->toScriptValue<QVariant>(toQVariant());
+        return sharedQmlEngine()->toScriptValue<QVariant>(toQVariant());
     }
     }
 }

src/native/QmlNet/QmlNet/qml/NetVariant.h

@@ -40,7 +40,7 @@ public:
     QSharedPointer<NetJSValue> getJsValue() const;
     void clear();
     static QSharedPointer<NetVariant> fromQJSValue(const QJSValue& qJsValue);
-    QJSValue toQJSValue(QJSEngine* jsEngine) const;
+    QJSValue toQJSValue() const;
     static void fromQVariant(const QVariant* variant, const QSharedPointer<NetVariant>& destination);
     static QSharedPointer<NetVariant> fromQVariant(const QVariant* variant);
     QVariant toQVariant() const;

src/native/QmlNet/QmlNet/qml/QQmlApplicationEngine.cpp

@@ -5,6 +5,17 @@
 #include <QmlNet/qml/JsNetObject.h>
 #include <QQmlContext>
 
+static QQmlApplicationEngine* sharedQmlEngineValue = nullptr;
+
+QQmlApplicationEngine* sharedQmlEngine()
+{
+    if(sharedQmlEngineValue == nullptr) {
+        qWarning("An attempt was made to get a shared application engine, but it is NULL. .NET needs to know about it. Returning null, but expect segfaults.");
+        return nullptr;
+    }
+    return sharedQmlEngineValue;
+}
+
 static int netValueTypeNumber = 0;
 
 #define NETVALUETYPE_CASE(N) \
@@ -28,6 +39,8 @@ Q_DECL_EXPORT QQmlApplicationEngineContainer* qqmlapplicationengine_create(QQmlA
         ownsEngine = true;
     }
 
+    sharedQmlEngineValue = engine;
+
     JsNetObject* netObject = new JsNetObject();
 
     engine->rootContext()->setContextProperty("Net", netObject);

src/native/QmlNet/QmlNet/qml/QQmlApplicationEngine.h

@@ -5,6 +5,8 @@
 #include <QQmlApplicationEngine>
 #include <QmlNet/qml/JsNetObject.h>
 
+QQmlApplicationEngine* sharedQmlEngine();
+
 struct QQmlApplicationEngineContainer {
     QQmlApplicationEngine* qmlEngine;
     JsNetObject* netObject;