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 EE639384601F; Mon,  8 Mar 2021 21:24:15 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EE639384601F
From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/98384] [11 Regression] new test case
 20_util/to_chars/long_double.cc in r11-6249 fails on powerpc64 BE
Date: Mon, 08 Mar 2021 21:24:15 +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: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: iains at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P1
X-Bugzilla-Assigned-To: ppalka at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-98384-4-1pgf41s7tD@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-98384-4@http.gcc.gnu.org/bugzilla/>
References: <bug-98384-4@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: <https://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: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Mon, 08 Mar 2021 21:24:16 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98384

--- Comment #28 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #27)
> for Darwin x86
>=20
> * the test at line 83 fails, and with some more debugging stuff inserted =
and
> the abort removed, there are 66 cases where the strings do not agree, so a
> bug in libc (probably) .. I'm doing seem more tests on a newer system
> version.

repeated on macOS11 (Darwin20) - the fails are for precisions 1, 5, 9 and 13
(if there's any significance to that) with a pattern that looks like this:

begin 9.2p-11003, printf_buffer 0x9.1p-11003
FAILED: prec has value 1
--
begin 9.1a2b4p-11003, printf_buffer 0x9.1a2b3p-11003
FAILED: prec has value 5
--
begin 9.1a2b3c4d6p-11003, printf_buffer 0x9.1a2b3c4d5p-11003
FAILED: prec has value 9
--
begin 9.1a2b3c4d5e6f8p-11003, printf_buffer 0x9.1a2b3c4d5e6f7p-11003
FAILED: prec has value 13
--
begin 9.1a2b3c4d5e6f8p-11003, printf_buffer 0x9.1a2b3c4d5e6f7p-11003
FAILED: prec has value 13
--
begin 9.1a2b3c4d5e6f8p-11003, printf_buffer 0x9.1a2b3c4d5e6f7p-11003
FAILED: prec has value 13

(and similarly for the other values that fail, not read the code enough yet=
 to
figure out why we get the three cases for 13...).=