Thanks Vincent, I no longer get a crash. I still have the following issues (let me know if I should open up tickets):
I'm not too enthusiastic about opening tickets just because code has been committed which hasn't been tested beforehand.
- When selecting all and copying UserGuide.lyx, I get the dialogs mentioned before. - When selecting all and copying Addional.lyx, I get the following message: "LyX does not know how to include non-LyX files when generating HTML output. Offending file: SpecialParagraphShape.tex" - When selecting all and copying EmbeddedObjects.lyx, I get the following errors: File '/tmp/lyx_tmpdir.n11551/DummyTextDocument.txt' is not readable! support/FileName.cpp (732): File '/tmp/lyx_tmpdir.n11551/DummyTextDocument.txt' is not readable! support/FileName.cpp (732): File '/tmp/lyx_tmpdir.n11551/EmbeddedObjects.lyx' is not readable!
Maybe I will even request to revert this and readd this after LyX2.1 has been released. I'm afraid that this will have too many problems in practice.
Vincent