this is a gcc file, you can download it and learn its usetility, for further detail please look at t

				// PR c++/411								// Test that a fully-constructed base is destroyed before transferring				// control to the handler of a function-try-block.								// Split into pieces for binary compatibility testing October 2002								extern void dtor1_x (void);								int				main ()				{				  dtor1_x ();				}