Check result of dynamic cast

Kakadu / lablqml

Interfacing Qt/QML with OCaml. Formely known as lablqt

http://kakadu.github.io/lablqml

GNU Lesser General Public License v2.1

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Check result of dynamic cast #60

Closed copy closed 4 years ago

copy commented 5 years ago

This cast is failing on my phone running SailfishOS (Qt 5.6.13), so the current version segfaults. I'm not sure why, going through Labqml.create_app_engine and QQuickWindow.show works fine (yay for writing phone apps in OCaml). This just asserts that the cast worked.