From: Patrick Palka <ppalka@redhat.com>
To: Jonathan Wakely <jwakely@redhat.com>
Cc: Patrick Palka <ppalka@redhat.com>,
gcc-patches@gcc.gnu.org, libstdc++@gcc.gnu.org
Subject: Re: [PATCH] libstdc++: Fix division by zero in std::sample
Date: Tue, 20 Oct 2020 13:36:43 -0400 (EDT) [thread overview]
Message-ID: <fca35974-7c59-2114-9669-5f8bdf126513@idea> (raw)
In-Reply-To: <20201020170239.GA954627@redhat.com>
On Tue, 20 Oct 2020, Jonathan Wakely wrote:
> On 21/09/20 16:01 +0100, Jonathan Wakely wrote:
> > On 18/09/20 21:08 -0400, Patrick Palka via Libstdc++ wrote:
> > > This fixes a division by zero in the selection-sampling std::__search
> > > overload when the input range is empty (and hence __unsampled_sz is 0).
> > >
> > > Tested on x86_64-pc-linux-gnu.
> > >
> > > libstdc++-v3/ChangeLog:
> > >
> > > * include/bits/stl_algo.h (__sample): Exit early when the
> > > input range is empty.
> > > * testsuite/25_algorithms/sample/3.cc: New test.
> > > ---
> > > libstdc++-v3/include/bits/stl_algo.h | 3 ++
> > > .../testsuite/25_algorithms/sample/3.cc | 50 +++++++++++++++++++
> > > 2 files changed, 53 insertions(+)
> > > create mode 100644 libstdc++-v3/testsuite/25_algorithms/sample/3.cc
> >
> > OK, thanks.
>
> Could you please backport this to all branches too.
Ah yes, sorry about losing track of this patch. I should be able to get
the backports done by end of today.
next prev parent reply other threads:[~2020-10-20 17:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-19 1:08 [PATCH] libstdc++: Mark some more algorithms constexpr for C++20 Patrick Palka
2020-09-19 1:08 ` [PATCH] libstdc++: Fix division by zero in std::sample Patrick Palka
2020-09-21 12:46 ` Patrick Palka
2020-09-21 15:01 ` Jonathan Wakely
2020-10-20 17:02 ` Jonathan Wakely
2020-10-20 17:36 ` Patrick Palka [this message]
2020-09-21 14:52 ` [PATCH] libstdc++: Mark some more algorithms constexpr for C++20 Jonathan Wakely
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