boost/boost-1.69-mpi-c_data.patch
2019-02-14 15:24:04 +00:00

28 lines
1.3 KiB
Diff

From dc708430bf5fd31d29da2e7e6b5fd20fe593e106 Mon Sep 17 00:00:00 2001
From: Michael Kuron <mkuron@users.noreply.github.com>
Date: Thu, 14 Feb 2019 15:55:31 +0100
Subject: [PATCH] mpi::detail::c_data needs to check for empty vectors
If the standard library is configured to do range checks (-D _GLIBCXX_ASSERTIONS), accessing the zeroth element of a vector to get its address triggers an assertion.
---
include/boost/mpi/detail/antiques.hpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/boost/mpi/detail/antiques.hpp b/include/boost/mpi/detail/antiques.hpp
index 0bd235b2..93b8efe9 100644
--- a/include/boost/mpi/detail/antiques.hpp
+++ b/include/boost/mpi/detail/antiques.hpp
@@ -19,10 +19,10 @@ namespace detail {
// serve as an incentive to get rid of this when those compilers
// are dropped.
template <typename T, typename A>
- T* c_data(std::vector<T,A>& v) { return &(v[0]); }
+ T* c_data(std::vector<T,A>& v) { if (v.empty()) return NULL; return &(v[0]); }
template <typename T, typename A>
- T const* c_data(std::vector<T,A> const& v) { return &(v[0]); }
+ T const* c_data(std::vector<T,A> const& v) { if (v.empty()) return NULL; return &(v[0]); }
// Some old MPI implementation (OpenMPI 1.6 for example) have non
// conforming API w.r.t. constness.