* g++.dg/eh/nested-try.C: New test.

	PR middle-end/40043
	* except.c (copy_eh_region): Always set prev_try.
	(redirect_eh_edge_to_label): Find outer try.
	(foreach_reachable_handler): When looking for prev try
	handle case where previous try is not going to be taken.

From-SVN: r147317