[Bug libstdc++/86447] gcc 9.0 from r262456 can't build cross compiler for mingw-w64 target

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86447

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Aug 16 15:56:21 2018
New Revision: 263590

URL: https://gcc.gnu.org/viewcvs?rev=263590&root=gcc&view=rev
Log:
Fix bootstrap with --enable-fully-dynamic-string

        PR libstdc++/86447
        * src/c++11/cow-stdexcept.cc [_GLIBCXX_FULLY_DYNAMIC_STRING]
        (logic_error::logic_error(logic_error&&))
        (logic_error::operator=(logic_error&&))
        (runtime_error::runtime_error(runtime_error&&))
        (runtime_error::operator=(runtime_error&&)): Copy strings instead of
        moving, to avoid allocating empty reps for moved-from strings.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/src/c++11/cow-stdexcept.cc