From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 0EAF83858C5E; Mon, 10 Jul 2023 19:04:41 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0EAF83858C5E
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1689015881;
	bh=WAkH8J8ouuNmRHkHS9mjroi575UB9OkdI+S1Snn1/oY=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=vL0eWJriUGymkAwKnnERDe5mbR8C7dVPNnO0csh0F/NyrddAO3eiBIaDW2smB+0f/
	 59+om/ioCcqiPejN2XVrGXpZHwVBOFn+VQVH+gV8yy+mqpCtgkSfwQ6kCHh1v3VdcW
	 d37MtNd+iFNPhPIFGXUXoZt2dEoIKnt0NgRNV6sk=
From: "fchelnokov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/110619] Dangling pointer returned from constexpr function
 converts in nullptr
Date: Mon, 10 Jul 2023 19:04:40 +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: 13.1.0
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: normal
X-Bugzilla-Who: fchelnokov at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-110619-4-NShvtZifP7@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-110619-4@http.gcc.gnu.org/bugzilla/>
References: <bug-110619-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110619

--- Comment #3 from Fedor Chelnokov <fchelnokov at gmail dot com> ---
I think according to https://eel.is/c++draft/basic.stc#general-4 the functi=
on
shall return an "invalid pointer valued". And nullptr is not considered suc=
h.

And if one modifies the function slightly (see auto p appear):

constexpr auto g() {
    int i =3D 0;
    auto p =3D &i;
    return p;
};

Then static_assert passes: https://gcc.godbolt.org/z/5shcxfcxG=