[mainline/4.0] Fix duplicate_bb wrt EH handling

[Jan Hubicka]

> On Mon, Apr 25, 2005 at 09:42:25AM +0200, Jan Hubicka wrote:
> 
> > 	* tree-cfg.c (tree_duplicate_bb): Duplicate EH region too.
> >
> OK together with the verifier change.  Please commit both changes
> together.  Remember which tests fail the new EH verification?

This is what tester reports, but I've just run full libstdc++ testsuite
on my machine and it works.  I will commit the change and try to figure
out whether the bug is somehow context sensitive (both machines compile
for i686-linux so it looks weird)

Thanks,
Honza

Tests that now fail, but worked before:

ext/stdio_sync_filebuf/wchar_t/12077.cc (test for excess errors)