[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 #18 from Christian Franke <franke at computer dot org> ---
With patch from r261873, crash on -std=c++17 does no longer occur with testcase
from comment #3.  Same for a wchar_t version of the testcase.
According to objdump -p, executable now imports _S_empty_rep_storage[] from
cygstdc++-6.dll.

No new regressions with -std=c++14, -static, -D_GLIBCXX_USE_CXX11_ABI.