Why Qt Creator does not recognize a component and why it crashes?

I created the qmldir file =>

@module cwQuickQt.Controls
plugin cwQuickQtControls
classname QuickQt
typeinfo plugins.qmltypes@

and generated plugins.qmltypes via qmlplugindump (Qt 5.4) =>

E:\Win32\bin>qmlplugindump.exe cwQuickQt.Controls 1.0 E:\Win32\bin\qml > E:\Win32\bin\qml\cwQuickQt\Controls\plugins.qmltypes

Output

@GraphicsWindowQtQ::initialize(): no traits were specified. Creating window with
default settings...
This plugin does not support propagateSizeHints()
This plugin does not support propagateSizeHints()
This plugin does not support propagateSizeHints()
import QtQuick.tooling 1.1

// This file describes the plugin-supplied types contained in the library.
// It is used for QML tooling purposes only.
//
// This file was auto-generated by:
// 'qmlplugindump.exe cwQuickQt.Controls 1.0 E:\Win32\bin\qml'

Module {
Component {
prototype: "QObject"
name: "cwQuickQt.Controls/GraphicsApplicationWindow"
exports: ["GraphicsApplicationWindow 1.0"]
exportMetaObjectRevisions: [0]
isComposite: true
defaultProperty: "data"
Property { name: "menuBar"; type: "MenuBar_QMLTYPE_4"; isPointer: true }

    Property { name: "toolBar"; type: "QQuickItem"; isPointer: true }
    Property { name: "statusBar"; type: "QQuickItem"; isPointer: true }
    Property { name: "style"; type: "QQmlComponent"; isPointer: true }
    Property { name: "__topBottomMargins"; type: "double" }
    Property { name: "__qwindowsize_max"; type: "double"; isReadonly: true }

    Property { name: "__width"; type: "double" }
    Property { name: "__height"; type: "double" }
    Property { name: "contentItem"; type: "ContentItem_QMLTYPE_2"; isReadonl

y: true; isPointer: true }
Property { name: "__style"; type: "QObject"; isReadonly: true; isPointer
: true }
Property { name: "__panel"; type: "QObject"; isReadonly: true; isPointer
: true }
Property { name: "data"; type: "QObject"; isList: true; isReadonly: true
}
Signal {
name: "postRender"
Parameter { name: "painter"; type: "QPainter"; isPointer: true }
}
Signal { name: "multiSampleRequestDone" }
Method { name: "update" }
Method {
name: "updateLater"
Parameter { name: "force"; type: "bool" }
}
Method { name: "updateLater" }
Property { name: "color"; type: "QColor" }
Property {
name: "activeFocusItem"
revision: 1
type: "QQuickItem"
isReadonly: true
isPointer: true
}
Signal { name: "frameSwapped" }
Signal {
name: "openglContextCreated"
revision: 2
Parameter { name: "context"; type: "QOpenGLContext"; isPointer: true
}
}
Signal { name: "sceneGraphInitialized" }
Signal { name: "sceneGraphInvalidated" }
Signal { name: "beforeSynchronizing" }
Signal { name: "afterSynchronizing"; revision: 2 }
Signal { name: "beforeRendering" }
Signal { name: "afterRendering" }
Signal { name: "afterAnimating"; revision: 2 }
Signal { name: "sceneGraphAboutToStop"; revision: 2 }
Signal {
name: "closing"
revision: 1
Parameter { name: "close"; type: "QQuickCloseEvent"; isPointer: true
}
}
Signal {
name: "colorChanged"
Parameter { type: "QColor" }
}
Signal {
name: "sceneGraphError"
revision: 2
Parameter { name: "error"; type: "QQuickWindow::SceneGraphError" }
Parameter { name: "message"; type: "string" }
}
Method { name: "releaseResources" }
Property { name: "title"; type: "string" }
Property { name: "modality"; type: "Qt::WindowModality" }
Property { name: "flags"; type: "Qt::WindowFlags" }
Property { name: "x"; type: "int" }
Property { name: "y"; type: "int" }
Property { name: "width"; type: "int" }
Property { name: "height"; type: "int" }
Property { name: "minimumWidth"; type: "int" }
Property { name: "minimumHeight"; type: "int" }
Property { name: "maximumWidth"; type: "int" }
Property { name: "maximumHeight"; type: "int" }
Property { name: "visible"; type: "bool" }
Property { name: "active"; revision: 1; type: "bool"; isReadonly: true }

    Property { name: "visibility"; revision: 1; type: "Visibility" }
    Property { name: "contentOrientation"; type: "Qt::ScreenOrientation" }
    Property { name: "opacity"; revision: 1; type: "double" }
}

}@