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 C9424388A009; Thu,  2 Apr 2020 13:00:40 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C9424388A009
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1585832440;
 bh=3gTsd2nWVjGu+sRU7uWqo7dcaG50O6owYTSVLreRijE=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=sEQ/DdACSGrDaw/qjzCYJaWpH2jEEq2Y+9cHq6EljjwNSdWmoHGkm9kgez++uWCNu
 fyHYBdPO4al4clzmeXj6prTD0EyaUr/nj1a5uTenj1b09CbQIN5DQz1ufBZnP2z6mL
 Z/GLLZKvhfTAwnnSo9RxOlLZ15g8/GqvNLuc+AvU=
From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/94454] ICE 'canonical types differ for identical types'
Date: Thu, 02 Apr 2020 13:00:40 +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: 10.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: nathan 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: 10.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-94454-4-GjnQvWCROI@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-94454-4@http.gcc.gnu.org/bugzilla/>
References: <bug-94454-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 02 Apr 2020 13:00:40 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94454

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |nathan at gcc dot gnu.org

--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Oh, it is from the template specialization hash table.  I suggest making th=
at
very poor to increase collisions:

pt.c:
static hashval_t
hash_tmpl_and_args (tree tmpl, tree args)
{
  hashval_t val =3D iterative_hash_object (DECL_UID (tmpl), 0);
   return val; // INSERT THIS LINE
  return iterative_hash_template_arg (args, val);
}

sorry for not realizing this earlier=