Source incompatible change in metatype system

.... linux-g++ -o .obj/debug-shared/texteditor.o texteditor.cpp
In file included from /data/dev/qt-5/qtbase/include/QtCore/qmetatype.h:1:0,
                 from /data/dev/qt-5/qtbase/include/QtCore/QMetaType:1,
                 from ../../plugins/coreplugin/id.h:36,
                 from textdocument.h:36,
                 from texteditor.h:34,
                 from texteditor.cpp:31:
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h: In instantiation of 'struct Myns::QtPrivate::IsQEnumHelper<TextEditor::StorageSettings>':
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1554:40:   required from 'struct Myns::QMetaTypeId<TextEditor::StorageSettings>'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1570:10:   required from 'struct Myns::QMetaTypeId2<TextEditor::StorageSettings>'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1575:8:   required from 'struct Myns::QMetaTypeId2<const TextEditor::StorageSettings&>'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qobject_impl.h:90:49:   required from 'struct Myns::QtPrivate::TypesAreDeclaredMetaType<Myns::QtPrivate::List<const TextEditor::StorageSettings&> >'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:233:87:   required from 'static Myns::QMetaObject::Connection Myns::QObject::connect(const typename Myns::QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename Myns::QtPrivate::FunctionPointer<Func2>::Object*, Func2, Myns::Qt::ConnectionType) [with Func1 = void (TextEditor::TextEditorSettings::*)(const TextEditor::StorageSettings&); Func2 = void (TextEditor::TextEditorWidget::*)(const TextEditor::StorageSettings&); typename Myns::QtPrivate::FunctionPointer<Func>::Object = TextEditor::TextEditorSettings; typename Myns::QtPrivate::FunctionPointer<Func2>::Object = TextEditor::TextEditorWidget]'
texteditor.cpp:2890:53:   required from here
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1375:61: error: invalid use of incomplete type 'const class TextEditor::StorageSettings'
In file included from texteditor.h:34:0,
                 from texteditor.cpp:31:
textdocument.h:56:7: error: forward declaration of 'const class TextEditor::StorageSettings'
In file included from /data/dev/qt-5/qtbase/include/QtCore/qmetatype.h:1:0,
                 from /data/dev/qt-5/qtbase/include/QtCore/QMetaType:1,
                 from ../../plugins/coreplugin/id.h:36,
                 from textdocument.h:36,
                 from texteditor.h:34,
                 from texteditor.cpp:31:
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h: In instantiation of 'struct 
Myns::QtPrivate::IsQEnumHelper<TextEditor::ExtraEncodingSettings>':
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1554:40:   required from 'struct Myns::QMetaTypeId<TextEditor::ExtraEncodingSettings>'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1570:10:   required from 'struct Myns::QMetaTypeId2<TextEditor::ExtraEncodingSettings>'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1575:8:   required from 'struct Myns::QMetaTypeId2<const TextEditor::ExtraEncodingSettings&>'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qobject_impl.h:90:49:   required from 'struct Myns::QtPrivate::TypesAreDeclaredMetaType<Myns::QtPrivate::List<const TextEditor::ExtraEncodingSettings&> >'
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:233:87:   required from 'static Myns::QMetaObject::Connection Myns::QObject::connect(const typename Myns::QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename Myns::QtPrivate::FunctionPointer<Func2>::Object*, Func2, Myns::Qt::ConnectionType) [with Func1 = void (TextEditor::TextEditorSettings::*)(const TextEditor::ExtraEncodingSettings&); Func2 = void (TextEditor::TextEditorWidget::*)(const TextEditor::ExtraEncodingSettings&); typename Myns::QtPrivate::FunctionPointer<Func>::Object = TextEditor::TextEditorSettings; typename Myns::QtPrivate::FunctionPointer<Func2>::Object = TextEditor::TextEditorWidget]'
texteditor.cpp:2900:59:   required from here
/data/dev/qt-5/qtbase/include/QtCore/../../src/corelib/kernel/qmetatype.h:1375:61: error: invalid use of incomplete type 'const class TextEditor::ExtraEncodingSettings'
In file included from texteditor.h:34:0,
                 from texteditor.cpp:31:
textdocument.h:53:7: error: forward declaration of 'const class TextEditor::ExtraEncodingSettings'
ICECC[13931] 12:23:29: Compiled on 10.9.78.24
Makefile:15699: recipe for target '.obj/debug-shared/texteditor.o' failed