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 9A119385841E; Fri,  9 Feb 2024 14:03:43 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9A119385841E
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1707487423;
	bh=EnXaSmbH8ebIkOVyxu2S8glQVneRu6ymtizplrYQwBc=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=BupRzgv7Lu9C7+OxpOSvwxy/myph2cTKX5wVXa2L9DgRx/Ljwhc5IfbDhq44RMBIi
	 O1q9lpbcKaS81Vxli05fDwWhtmF+5gJqoyWi9tPQbG2XauvdA0VGXP7xIndbBnh+3A
	 gQz2JDZW8wEs6QvXcaS2a4IQaI3sXaUd+sRb9kLI=
From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/113841] Can't swap two std::hash<T*>
Date: Fri, 09 Feb 2024 14:03:43 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 12.1.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: redi at gcc dot gnu.org
X-Bugzilla-Status: NEW
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-113841-4-YijmJFWfpH@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-113841-4@http.gcc.gnu.org/bugzilla/>
References: <bug-113841-4@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=3D113841

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
IIRC the reason we don't just default that constructor is because we need t=
o be
sure to value-initialize the allocator, not just default-initialize it.=