libstdc++/71004 fix recursive_directory_iterator default constructor

	PR libstdc++/71004
	* include/experimental/bits/fs_dir.h (recursive_directory_iterator):
	Initialize scalar member variables in default constructor.
	* testsuite/experimental/filesystem/iterators/
	recursive_directory_iterator.cc: Teste default construction.

From-SVN: r236023

libstdc++-v3/ChangeLog

+2016-05-09  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/71004
+	* include/experimental/bits/fs_dir.h (recursive_directory_iterator):
+	Initialize scalar member variables in default constructor.
+	* testsuite/experimental/filesystem/iterators/
+	recursive_directory_iterator.cc: Teste default construction.
+
 2016-05-05  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* testsuite/lib/libstdc++.exp (libstdc++_init): Enable on *-*-solaris*.

libstdc++-v3/include/experimental/bits/fs_dir.h

@@ -301,8 +301,8 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
 
     struct _Dir_stack;
     std::shared_ptr<_Dir_stack> _M_dirs;
-    directory_options _M_options;
-    bool _M_pending;
+    directory_options _M_options = {};
+    bool _M_pending = false;
   };
 
   inline recursive_directory_iterator

libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc

@@ -97,6 +97,16 @@ test01()
   remove_all(p, ec);
 }
 
+void
+test02()
+{
+  // libstdc++71004
+  const fs::recursive_directory_iterator it;
+  assert( it.options() == fs::directory_options{} );
+  assert( it.depth() == 0 );
+  assert(it.recursion_pending() == false);
+}
+
 int
 main()
 {