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 B00303861800; Wed, 14 Feb 2024 22:35:44 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B00303861800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1707950144;
	bh=YeVZOV+b1PNPFBnq2jAf7/EkdD5vksIyJdYErkWMiP8=;
	h=From:To:Subject:Date:From;
	b=n4cl1gdl3slsUtRmEQWgkdlGfsm8BvMz1BmL1R+Rtra0TVGowydagXL5cLUHmeSos
	 1l+zbsND837l7BeuMrQbYX5Eevx6ydllOsgKa/l1qi2uJ+l2jJbaJkr/VXi1+YaSzC
	 cFt0hL8tqI0iLp1RxjrmA3ug7d8PmWjfwd86cqck=
From: "gieseanw+gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/113925] New: static assert on requires clause with non-type
 bool template instantiated with immediately invoked consteval lambda is
 incorrectly rejected
Date: Wed, 14 Feb 2024 22:35:44 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 13.2.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: gieseanw+gcc 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: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-113925-4@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=3D113925

            Bug ID: 113925
           Summary: static assert on requires clause with non-type bool
                    template instantiated with immediately invoked
                    consteval lambda is incorrectly rejected
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gieseanw+gcc at gmail dot com
  Target Milestone: ---

template<bool B>
struct b{};
static_assert(requires { b<([]()consteval{ return true; }())>{}; });

In gcc 13.2 and 14.0.1 this produces:

error: template argument 1 is invalid
    3 | static_assert(requires { b<([]()consteval{ return true; }())>{}; });
      |                                                     ^

Godbolt: https://godbolt.org/z/7dacc7rKr
StackOverflow: https://stackoverflow.com/a/77996234/27678=