From a23e4d5a3b4043adbcbce2545cb62e5ea98654c6 Mon Sep 17 00:00:00 2001
From: Nikola Forró <nforro@redhat.com>
Date: Apr 04 2018 13:44:23 +0000
Subject: - resolves: #1562364

  do not call back() on an empty vector

---

diff --git a/aspell-0.60.6.1-fix-back-on-empty-vector.patch b/aspell-0.60.6.1-fix-back-on-empty-vector.patch
new file mode 100644
index 0000000..f41db9b
--- /dev/null
+++ b/aspell-0.60.6.1-fix-back-on-empty-vector.patch
@@ -0,0 +1,38 @@
+From c6755a399e8a31cbee5129dde5124f9c54a47ab6 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Nikola=20Forr=C3=B3?= <nforro@redhat.com>
+Date: Wed, 4 Apr 2018 14:58:03 +0200
+Subject: [PATCH] Do not call back() on an empty vector
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Calling std::vector::back() on an empty container is undefined.
+Avoid doing that, simply return pointer to the beginning in case
+the vector is empty.
+
+Signed-off-by: Nikola Forró <nforro@redhat.com>
+---
+ common/vector.hpp | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/common/vector.hpp b/common/vector.hpp
+index 782e4b0..cb344bd 100644
+--- a/common/vector.hpp
++++ b/common/vector.hpp
+@@ -36,13 +36,13 @@ namespace acommon
+     }
+     T * data() {return &*this->begin();}
+     T * data(int pos) {return &*this->begin() + pos;}
+-    T * data_end() {return &this->back()+1;}
++    T * data_end() {return this->empty() ? &*this->begin() : &this->back()+1;}
+ 
+     T * pbegin() {return &*this->begin();}
+-    T * pend()   {return &this->back()+1;}
++    T * pend()   {return this->empty() ? &*this->begin() : &this->back()+1;}
+ 
+     const T * pbegin() const {return &*this->begin();}
+-    const T * pend()   const {return &this->back()+1;}
++    const T * pend()   const {return this->empty() ? &*this->begin() : &this->back()+1;}
+ 
+     template <typename U>
+     U * datap() { 
diff --git a/aspell.spec b/aspell.spec
index 26d52d5..207518f 100644
--- a/aspell.spec
+++ b/aspell.spec
@@ -1,7 +1,7 @@
 Summary: Spell checker
 Name: aspell
 Version: 0.60.6.1
-Release: 20%{?dist}
+Release: 21%{?dist}
 Epoch: 12
 # LGPLv2+ .. common/gettext.h
 # LGPLv2  .. modules/speller/default/phonet.hpp,
@@ -26,6 +26,8 @@ Patch5: aspell-0.60.6.1-dump-personal-abort.patch
 Patch6: aspell-0.60.6.1-aarch64.patch
 # resolves: #1423239
 Patch7: aspell-0.60.6.1-gcc7-fixes.patch
+# resolves: #1562364
+Patch8: aspell-0.60.6.1-fix-back-on-empty-vector.patch
 
 BuildRequires: gcc-c++
 BuildRequires: chrpath, gettext, ncurses-devel, pkgconfig, perl-interpreter
@@ -64,6 +66,7 @@ and header files needed for Aspell development.
 %patch5 -p1 -b .dump-personal
 %patch6 -p1 -b .aarch64
 %patch7 -p1 -b .gcc7-fixes
+%patch8 -p1 -b .back-empty-vector
 iconv -f iso-8859-2 -t utf-8 < manual/aspell.info > manual/aspell.info.aux
 mv manual/aspell.info.aux manual/aspell.info
 
@@ -156,6 +159,10 @@ fi
 %{_mandir}/man1/pspell-config.1*
 
 %changelog
+* Wed Apr 04 2018 Nikola Forró <nforro@redhat.com> - 12:0.60.6.1-21
+- resolves: #1562364
+  do not call back() on an empty vector
+
 * Tue Feb 20 2018 Nikola Forró <nforro@redhat.com> - 12:0.60.6.1-20
 - add missing gcc-c++ build dependency