Please see attached test case.

Running this example through GDB with the QML inspector enabled crashes instantly.

Backtrace:
0 __GI_raise raise.c 56 0x7ffff533dd27
1 __GI_abort abort.c 89 0x7ffff533f418
2 qt_message_fatal qlogging.cpp 1411 0x7ffff5c9705c
3 QMessageLogger::fatal qlogging.cpp 639 0x7ffff5c93748
4 qt_assert qglobal.cpp 2810 0x7ffff5c8d19d
5 QmlJSDebugger::QtQuick2::QtQuick2Plugin::activate qtquick2plugin.cpp 62 0x7fffe05f4a6e
6 QQmlInspectorService::updateState qqmlinspectorservice.cpp 120 0x7ffff665fe45
7 QQmlInspectorService::removeView qqmlinspectorservice.cpp 73 0x7ffff665f98b
8 QQuickViewPrivate::~QQuickViewPrivate qquickview.cpp 101 0x7ffff7b5d83b
9 QQuickViewPrivate::~QQuickViewPrivate qquickview.cpp 102 0x7ffff7b5d8f4
10 QScopedPointerDeleter<QObjectData>::cleanup qscopedpointer.h 54 0x7ffff5f8adc8
11 QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::~QScopedPointer qscopedpointer.h 101 0x7ffff5f89237
12 QObject::~QObject qobject.cpp 882 0x7ffff5f7dfc4
13 QWindow::~QWindow qwindow.cpp 202 0x7ffff69dc6bf
14 QQuickWindow::~QQuickWindow qquickwindow.cpp 1100 0x7ffff7a7080f
15 QQuickView::~QQuickView qquickview.cpp 220 0x7ffff7b5dee7
16 QQuickView::~QQuickView qquickview.cpp 227 0x7ffff7b5df20
17 main main.cpp 22 0x40130e