[Bug libstdc++/86138] [7/8 Regression] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called

[franke at computer dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138

--- Comment #25 from Christian Franke <franke at computer dot org> ---
(In reply to Jonathan Wakely from comment #23)
> What if you test with -D_GLIBCXX_ASSERTIONS ?
> 
> (I expect you'll get a crash for either c++14 or c++17)

Yes.

Fixed with patch from r262167.


New Cygwin package gcc-7.3.0-3 includes r261873 but not r262167.