commit c3fa9655a4cc1ddaf521e9ca51d2b8c855f649e5
author Marshall Clow <mclow.lists@gmail.com> Mon Oct 30 15:50:00 2017 +0000
committer Marshall Clow <mclow.lists@gmail.com> Mon Oct 30 15:50:00 2017 +0000
tree 7be4d135eb55b5c5e2e13434f48f33f4c4248e4a
parent 9bc42cf1d7e0f098d04b9837f126d4187b4e3c55

Fix PR#35119 : set_union misbehaves with move_iterators. Thanks to Denis Yaroshevskiy for both the bug report and the fix.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@316914 91177308-0d34-0410-b5e6-96231b3b80d8

include/algorithm

diff --git a/include/algorithm b/include/algorithm
index 282083a..f5776b4 100644
--- a/include/algorithm
+++ b/include/algorithm
@@ -5547,9 +5547,9 @@
         }
         else
         {
-            *__result = *__first1;
             if (!__comp(*__first1, *__first2))
                 ++__first2;
+            *__result = *__first1;
             ++__first1;
         }
     }