[Bug libstdc++/89979] subtract_with_carry_engine incorrect carry flag

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89979

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-04-05
     Ever confirmed|0                           |1

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christoph Conrads from comment #1)
> There is no attachment with the preprocessed code demonstrating the problem
> because the this code is 1.2 MB large.

That's OK in this case as you code doesn't depend on anything except standard
library headers.