[Bug libstdc++/107778] handle_contract_violation should reflect _GLIBCXX_VERBOSE

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107778

--- Comment #7 from cqwrteur <unlvsur at live dot com> ---
(In reply to cqwrteur from comment #5)
> (In reply to Jonathan Wakely from comment #4)
> > (In reply to cqwrteur from comment #3)
> > > Also why the function is not noexcept?
> > 
> > Writing to streams can throw.
> > 
> > If you don't like the default handler you can provide your own.
> 
> then do not use stream

use stdio instead