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Changes between Initial Version and Version 1 of Ticket #9796, comment 4

initial	v1
1		From http://www.boost.org/doc/libs/~~1_55_0~~/libs/exception/doc/current_exception.html: "Whenever current_exception fails to properly copy the current exception object, it returns an exception_ptr to an object of type that is as close as possible to the original exception type, using unknown_exception as a final fallback." This is to say that your code must be prepared to deal with boost::current_exception failing to give you an object of the exact type.
	1	From http://www.boost.org/doc/libs/release/libs/exception/doc/current_exception.html: "Whenever current_exception fails to properly copy the current exception object, it returns an exception_ptr to an object of type that is as close as possible to the original exception type, using unknown_exception as a final fallback." This is to say that your code must be prepared to deal with boost::current_exception failing to give you an object of the exact type.
2	2
3	3	(The std::logic_error exception is also not properly cloned which can lead to slicing. Similar support for std::system_error is more problematic because it isn't available in all implementations yet. Where it is available, in all likelihood std::current_exception is available as well, so just use that.)