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* [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator?
@ 2014-10-09 17:13 vermaelen.wouter at gmail dot com
2014-10-09 18:17 ` [Bug libstdc++/63500] " glisse at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: vermaelen.wouter at gmail dot com @ 2014-10-09 17:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500
Bug ID: 63500
Summary: bug in debug version of std::make_move_iterator?
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: vermaelen.wouter at gmail dot com
Is the following a bug in the debug version of std::make_move_iterator or is it
a bug in my code? It compiles fine with older gcc versions (both debug and
non-debug). But when using a fairly recent gcc-5.0 snapshot it fails to compile
when using -D_GLIBCXX_DEBUG, non-debug mode works fine.
---- 8< -------- 8< -------- 8< -------- 8< -------- 8< ----
// Compiles fine with:
// g++-4.8 -std=c++11 -c -D_GLIBCXX_DEBUG bug.cc
// g++-snapshot -std=c++11 -c bug.cc
// But this fails:
// g++-snapshot -std=c++11 -c -D_GLIBCXX_DEBUG bug.cc
#include <iterator>
#include <memory>
#include <vector>
class Foo {};
std::vector<std::unique_ptr<Foo>> v;
std::vector<std::unique_ptr<Foo>> w;
void test() {
v.insert(end(v),
make_move_iterator(begin(w)),
make_move_iterator(end (w)));
}
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug libstdc++/63500] bug in debug version of std::make_move_iterator? 2014-10-09 17:13 [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator? vermaelen.wouter at gmail dot com @ 2014-10-09 18:17 ` glisse at gcc dot gnu.org 2014-10-09 18:36 ` [Bug libstdc++/63500] [4.9/5 Regression] " glisse at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: glisse at gcc dot gnu.org @ 2014-10-09 18:17 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500 --- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> --- (In reply to Wouter Vermaelen from comment #0) > Is the following a bug in the debug version of std::make_move_iterator or is > it a bug in my code? It compiles fine with older gcc versions (both debug > and non-debug). Hmm, earlier this year I modified move_iterator without touching the debug version (I hadn't realized it existed), that could be related. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/63500] [4.9/5 Regression] bug in debug version of std::make_move_iterator? 2014-10-09 17:13 [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator? vermaelen.wouter at gmail dot com 2014-10-09 18:17 ` [Bug libstdc++/63500] " glisse at gcc dot gnu.org @ 2014-10-09 18:36 ` glisse at gcc dot gnu.org 2014-10-09 18:45 ` redi at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: glisse at gcc dot gnu.org @ 2014-10-09 18:36 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500 Marc Glisse <glisse at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2014-10-09 Summary|bug in debug version of |[4.9/5 Regression] bug in |std::make_move_iterator? |debug version of | |std::make_move_iterator? Ever confirmed|0 |1 --- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> --- Ah, no, not my fault. The debug machinery wants at some point __addressof(*iter) but addressof wants an lvalue reference so it is not happy with a move iterator. Note that the error message is confusing: error: invalid initialization of non-const reference of type 'std::unique_ptr<Foo>&' from an rvalue of type 'std::unique_ptr<Foo>' when it is really an xvalue of type unique_ptr<Foo>&&. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/63500] [4.9/5 Regression] bug in debug version of std::make_move_iterator? 2014-10-09 17:13 [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator? vermaelen.wouter at gmail dot com 2014-10-09 18:17 ` [Bug libstdc++/63500] " glisse at gcc dot gnu.org 2014-10-09 18:36 ` [Bug libstdc++/63500] [4.9/5 Regression] " glisse at gcc dot gnu.org @ 2014-10-09 18:45 ` redi at gcc dot gnu.org 2014-10-10 20:37 ` fdumont at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: redi at gcc dot gnu.org @ 2014-10-09 18:45 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500 Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |fdumont at gcc dot gnu.org --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- François, is there a quick fix for this? >From gcc-bugs-return-463706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Oct 09 19:01:49 2014 Return-Path: <gcc-bugs-return-463706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org> Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 4255 invoked by alias); 9 Oct 2014 19:01:49 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: <gcc-bugs.gcc.gnu.org> List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/> List-Post: <mailto:gcc-bugs@gcc.gnu.org> List-Help: <mailto:gcc-bugs-help@gcc.gnu.org> Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 4216 invoked by uid 55); 9 Oct 2014 19:01:45 -0000 From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libquadmath/63488] large errors in y0q Date: Thu, 09 Oct 2014 19:01:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libquadmath X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: sgk at troutmask dot apl.washington.edu X-Bugzilla-Status: NEW 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-63488-4-3T4XN1s2me@http.gcc.gnu.org/bugzilla/> In-Reply-To: <bug-63488-4@http.gcc.gnu.org/bugzilla/> References: <bug-63488-4@http.gcc.gnu.org/bugzilla/> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-10/txt/msg00727.txt.bz2 Content-length: 1884 https://gcc.gnu.org/bugzilla/show_bug.cgi?idc488 --- Comment #8 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Thu, Oct 09, 2014 at 06:27:08PM +0000, zimmerma+gcc at loria dot fr wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?idc488 > > --- Comment #7 from Paul Zimmermann <zimmerma+gcc at loria dot fr> --- > I agree that near zeroes we can expect large errors. However for > other functions I got only small errors in ulps, maybe I was unlucky. > Also the ultimate goal is to get correct rounding, even near zeroes. > I suspect you got lucky :-) IIRC my testing correctly, exhaustive testing of values in each interval shows lgammaf(x) for x < 0 and not an integer also has major accuracy issues: Interval: Max ULP Value [-1.10000e+01, -1.00000e+01): 6.72889 -1.0000009e+01 [-1.00000e+01, -9.00000e+00): 83.4928 -9.0000029e+00 [-9.00000e+00, -8.00000e+00): 24615.2 -8.0000248e+00 [-8.00000e+00, -7.00000e+00): 22575.7 -7.9999752e+00 [-7.00000e+00, -6.00000e+00): 100393. -6.0013852e+00 [-6.00000e+00, -5.00000e+00): 36966.5 -5.0082183e+00 [-5.00000e+00, -4.00000e+00): 324309. -4.0393620e+00 [-4.00000e+00, -3.00000e+00): 2981098 -3.1435809e+00 [-3.00000e+00, -2.00000e+00): 7497618 -2.4570248e+00 [-2.00000e+00, -1.00000e+00): 4.18718 -1.7313151e+00 [-1.00000e+00, -4.76837e-07): 3.46651 -3.5002786e-01 troutmask:fvwm:kargl[209] ./testf -a -3.1435809e+00 libm: -2.38418579e-07, 1 mpfr: -1.96054615e-07, 1 The relevant code in testf is (RND is round-to-nearest). x = (float)strtof(optarg, NULL); y = lgammaf_r(x,&s); mpfr_inits2(DBL_MANT_DIG, t1, t2, NULL); mpfr_set_d(t1, (double)x, RND); mpfr_lgamma(t2, &si, t1, RND); printf("libm: %.8e, %d\n", y, s); mpfr_printf("mpfr: %.8Re, %d\n", t2, si); mpfr_clears(t1, t2, NULL); ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/63500] [4.9/5 Regression] bug in debug version of std::make_move_iterator? 2014-10-09 17:13 [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator? vermaelen.wouter at gmail dot com ` (2 preceding siblings ...) 2014-10-09 18:45 ` redi at gcc dot gnu.org @ 2014-10-10 20:37 ` fdumont at gcc dot gnu.org 2014-10-15 20:41 ` fdumont at gcc dot gnu.org 2015-03-11 19:54 ` redi at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: fdumont at gcc dot gnu.org @ 2014-10-10 20:37 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500 --- Comment #6 from François Dumont <fdumont at gcc dot gnu.org> --- Sorry, I reproduced the problem and it is not in _Safe_iterator operator-> so my previous remark is out of subject. >From gcc-bugs-return-463802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Oct 10 20:37:11 2014 Return-Path: <gcc-bugs-return-463802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org> Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 7382 invoked by alias); 10 Oct 2014 20:37:11 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: <gcc-bugs.gcc.gnu.org> List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/> List-Post: <mailto:gcc-bugs@gcc.gnu.org> List-Help: <mailto:gcc-bugs-help@gcc.gnu.org> Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 7332 invoked by uid 48); 10 Oct 2014 20:37:07 -0000 From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/63415] [4.9/5 Regression] internal compiler error:=?UTF-8?Q? unexpected expression ‘static_cast?=<int>(std::is_same<T, A1>{})=?UTF-8?Q?’ of kind static_cast_expr?Date: Fri, 10 Oct 2014 20:37:00 -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: 4.9.1 X-Bugzilla-Keywords: ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jason at gcc dot gnu.org X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jason at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.9.2 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution assigned_to Message-ID: <bug-63415-4-JYD7eFTpSU@http.gcc.gnu.org/bugzilla/> In-Reply-To: <bug-63415-4@http.gcc.gnu.org/bugzilla/> References: <bug-63415-4@http.gcc.gnu.org/bugzilla/> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-10/txt/msg00823.txt.bz2 Content-length: 503 https://gcc.gnu.org/bugzilla/show_bug.cgi?idc415 Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org --- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> --- Fixed. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/63500] [4.9/5 Regression] bug in debug version of std::make_move_iterator? 2014-10-09 17:13 [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator? vermaelen.wouter at gmail dot com ` (3 preceding siblings ...) 2014-10-10 20:37 ` fdumont at gcc dot gnu.org @ 2014-10-15 20:41 ` fdumont at gcc dot gnu.org 2015-03-11 19:54 ` redi at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: fdumont at gcc dot gnu.org @ 2014-10-15 20:41 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500 --- Comment #7 from François Dumont <fdumont at gcc dot gnu.org> --- Author: fdumont Date: Wed Oct 15 20:40:31 2014 New Revision: 216286 URL: https://gcc.gnu.org/viewcvs?rev=216286&root=gcc&view=rev Log: 2014-10-15 François Dumont <fdumont@gcc.gnu.org> Jonathan Wakely <jwakely@redhat.com> PR libstdc++/63500 * include/debug/functions.h (__foreign_iterator_aux2): Do not check for foreign iterators if input iterators returns rvalue reference. * testsuite/23_containers/vector/63500.cc: New. Added: trunk/libstdc++-v3/testsuite/23_containers/vector/63500.cc Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/debug/functions.h >From gcc-bugs-return-464176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 15 20:44:30 2014 Return-Path: <gcc-bugs-return-464176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org> Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 31186 invoked by alias); 15 Oct 2014 20:44:30 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: <gcc-bugs.gcc.gnu.org> List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/> List-Post: <mailto:gcc-bugs@gcc.gnu.org> List-Help: <mailto:gcc-bugs-help@gcc.gnu.org> Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 31130 invoked by uid 48); 15 Oct 2014 20:44:26 -0000 From: "fdumont at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/63500] [4.9/5 Regression] bug in debug version of std::make_move_iterator? Date: Wed, 15 Oct 2014 20:44:00 -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: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: fdumont at gcc dot gnu.org X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 5.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution target_milestone Message-ID: <bug-63500-4-H4kVjuZYFm@http.gcc.gnu.org/bugzilla/> In-Reply-To: <bug-63500-4@http.gcc.gnu.org/bugzilla/> References: <bug-63500-4@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-SW-Source: 2014-10/txt/msg01197.txt.bz2 Content-length: 594 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500 François Dumont <fdumont at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED Target Milestone|--- |5.0 --- Comment #8 from François Dumont <fdumont at gcc dot gnu.org> --- For now we just skip the check when input iterator do not expose lvalue reference. Thanks for the report. >From gcc-bugs-return-464177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 15 21:09:39 2014 Return-Path: <gcc-bugs-return-464177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org> Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 21335 invoked by alias); 15 Oct 2014 21:09:39 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: <gcc-bugs.gcc.gnu.org> List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/> List-Post: <mailto:gcc-bugs@gcc.gnu.org> List-Help: <mailto:gcc-bugs-help@gcc.gnu.org> Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 21268 invoked by uid 55); 15 Oct 2014 21:09:34 -0000 From: "paolo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/53000] Conditional operator does not behave as standardized Date: Wed, 15 Oct 2014 21:09:00 -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: 4.7.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: paolo at gcc dot gnu.org X-Bugzilla-Status: RESOLVED 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-53000-4-77awX6kZOW@http.gcc.gnu.org/bugzilla/> In-Reply-To: <bug-53000-4@http.gcc.gnu.org/bugzilla/> References: <bug-53000-4@http.gcc.gnu.org/bugzilla/> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-10/txt/msg01198.txt.bz2 Content-length: 569 https://gcc.gnu.org/bugzilla/show_bug.cgi?idS000 --- Comment #30 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> --- Author: paolo Date: Wed Oct 15 21:08:59 2014 New Revision: 216287 URL: https://gcc.gnu.org/viewcvs?rev!6287&root=gcc&view=rev Log: 2014-10-15 Daniel Krugler <daniel.kruegler@gmail.com> * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc: Enable tests predicated on PR c++/53000. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/63500] [4.9/5 Regression] bug in debug version of std::make_move_iterator? 2014-10-09 17:13 [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator? vermaelen.wouter at gmail dot com ` (4 preceding siblings ...) 2014-10-15 20:41 ` fdumont at gcc dot gnu.org @ 2015-03-11 19:54 ` redi at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: redi at gcc dot gnu.org @ 2015-03-11 19:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63500 Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dushistov at mail dot ru --- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> --- *** Bug 63711 has been marked as a duplicate of this bug. *** ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-03-11 19:54 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-10-09 17:13 [Bug libstdc++/63500] New: bug in debug version of std::make_move_iterator? vermaelen.wouter at gmail dot com 2014-10-09 18:17 ` [Bug libstdc++/63500] " glisse at gcc dot gnu.org 2014-10-09 18:36 ` [Bug libstdc++/63500] [4.9/5 Regression] " glisse at gcc dot gnu.org 2014-10-09 18:45 ` redi at gcc dot gnu.org 2014-10-10 20:37 ` fdumont at gcc dot gnu.org 2014-10-15 20:41 ` fdumont at gcc dot gnu.org 2015-03-11 19:54 ` redi at gcc dot gnu.org
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