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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89224] [9/10/11/12 Regregression] subscript of const vector
 is considered a rvalue
Date: Mon, 16 Aug 2021 20:50:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D89224

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-08-16
     Ever confirmed|0                           |1

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
And it was rejected correctly in GCC 6.4.0:
<source>: In instantiation of 'void g(T&) [with T =3D const unsigned char]':
<source>:8:9:   required from here
<source>:5:5: error: assignment of read-only reference 'x'
   x =3D 1;
   ~~^~~=