[patch] libstdc++/71004 fix recursive_directory_iterator default constructor

[Jonathan Wakely]

This fixes some uninitialized members in the
filesystem::recursive_directory_iterator default constructor.

Tested x86_64-linux, committed to trunk. Backports to follow soon.



commit 2b1c32ec504886625dae53274b14f86e2082a636
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Mon May 9 11:01:59 2016 +0100

    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.

diff --git a/libstdc++-v3/include/experimental/bits/fs_dir.h b/libstdc++-v3/include/experimental/bits/fs_dir.h
index 4e28c8e..f128cce 100644
--- a/libstdc++-v3/include/experimental/bits/fs_dir.h
+++ b/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
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc b/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
index 5d2e45b..a263602 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
+++ b/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()
 {