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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/108218] [12/13 Regression] Constant arguments in the new
 expression is not checked in unevaluated operand
Date: Sat, 24 Dec 2022 19:19:05 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 12.1.0
X-Bugzilla-Keywords: accepts-invalid, needs-bisection, rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: NEW
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X-Bugzilla-Priority: P3
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X-Bugzilla-Target-Milestone: 12.3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108218

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-12-24
      Known to work|                            |11.3.0
     Ever confirmed|0                           |1
            Summary|[12 Regression] Constant    |[12/13 Regression] Constant
                   |arguments in the new        |arguments in the new
                   |expression is not checked   |expression is not checked
                   |in unevaluated operand      |in unevaluated operand
      Known to fail|                            |12.1.0
   Target Milestone|---                         |12.3
           Keywords|                            |needs-bisection,
                   |                            |rejects-valid

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
Here is a rejects valid code:
template<class T>
concept C =3D requires
{
    new int[(int)sizeof(T) - 4];
};

template<typename T>
class CC {
    CC()  requires C<T> {
        new int[(int)sizeof(T) - 4];
    }
    CC()   {
    }
};

template class CC<char>;=