@@ -147,7 +147,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
bool _Executor<_BiIter, _Alloc, _TraitsT, __dfs_mode>::
_M_lookahead(_StateIdT __next)
{
- _ResultsVec __what(_M_cur_results.size());
+ // Backreferences may refer to captured content.
+ // We may want to make this faster by not copying,
+ // but let's not be clever prematurely.
+ _ResultsVec __what(_M_cur_results);
_Executor __sub(_M_current, _M_end, __what, _M_re, _M_flags);
__sub._M_states._M_start = __next;
if (__sub._M_search_from_first())
new file mode 100644
@@ -0,0 +1,43 @@
+// { dg-options "-std=gnu++11" }
+
+// Copyright (C) 2015 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 28.11.2 regex_match
+
+#include <regex>
+#include <testsuite_hooks.h>
+#include <testsuite_regex.h>
+
+using namespace __gnu_test;
+using namespace std;
+
+// libstdc++/68863
+void
+test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ VERIFY(!std::regex_match("aa", std::regex("(.)(?!\\1).")));
+}
+
+int
+main()
+{
+ test01();
+ return 0;
+}