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Subject: [Bug libstdc++/104559] vector<bool> v; v.insert(v.begin());
 compiles, but it shouldn't
Date: Wed, 16 Feb 2022 10:01:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104559

Jiang An <de34 at live dot cn> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |de34 at live dot cn

--- Comment #3 from Jiang An <de34 at live dot cn> ---
The default argument has been present in a very early (perhaps the first)
version of libstdc++.=20
https://github.com/gcc-mirror/gcc/blob/6599da043e22e96ac830fb50a61c1b6d95d1=
b142/libstdc%2B%2B/stl/bvector.h#L472

AFIAK this default argument has never been a part of the C++ standard, but =
was
in in some prehistoric working drafts. Seems removed by WG21-N1051.
http://www.open-std.org/JTC1/SC22/WG21/docs/wp/html/cd2/lib-containers.html=
#lib.vector.bool
http://www.open-std.org/JTC1/SC22/WG21/docs/papers/1997/N1051.asc=