[Bug libstdc++/61601] C++11 regex resource exhaustion

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61601

--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #13)
> The second one is rejected because {2444444444} is too large. It throws
> error_backref but maybe that should be error_space as well.

See Bug 123895 for that.