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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/98440] [9/10/11 Regression] Accepts ill-formed
 reinterpret_cast<int&&>(1)
Date: Sun, 27 Dec 2020 20:19:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98440

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |10.1.0, 11.0, 9.2.0
   Target Milestone|---                         |9.4
            Summary|Accepts ill-formed          |[9/10/11 Regression]
                   |reinterpret_cast<int&&>(1)  |Accepts ill-formed
                   |                            |reinterpret_cast<int&&>(1)
                 CC|                            |jason at gcc dot gnu.org
      Known to work|                            |8.3.0

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was correctly rejected until r260622:

    Fix cast to rvalue reference from prvalue.

            * cvt.c (diagnose_ref_binding): Handle rvalue reference.
            * rtti.c (build_dynamic_cast_1): Don't try to build a reference=
 to
            non-class type.  Handle xvalue argument.
            * typeck.c (build_reinterpret_cast_1): Allow cast from prvalue =
to
            rvalue reference.
            * semantics.c (finish_compound_literal): Do direct-initializati=
on,
            not cast, to initialize a reference.=