Ticket #3874: commiting last week's code, despite throwing exception, but this exception is only in Java, and does not come if we put App.debug messages in (to the CopyPaste class), trying to find their cause

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34928 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e