obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

9 files changed, 676 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/1.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/1.cc
new file mode 100644
index 000000000..64c5869b1
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/1.cc
@@ -0,0 +1,200 @@
+// 1999-05-11 bkoz
+
+// Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
+// 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/>.
+
+// 21.3.3 string capacity
+
+#include <string>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+template<typename T>
+  struct A { };
+
+template<typename T>
+  bool
+  operator==(const A<T>&, const A<T>&) { return true; }
+
+template<typename T>
+  bool
+  operator<(const A<T>&, const A<T>&) { return true; }
+
+struct B { };
+
+// char_traits specialization
+namespace std
+{
+  template<>
+    struct char_traits<A<B> >
+    {
+      typedef A<B> 		char_type;
+      // Unsigned as wint_t in unsigned.
+      typedef unsigned long  	int_type;
+      typedef streampos 	pos_type;
+      typedef streamoff 	off_type;
+      typedef mbstate_t 	state_type;
+      
+      static void 
+      assign(char_type& __c1, const char_type& __c2)
+      { __c1 = __c2; }
+
+      static bool 
+      eq(const char_type& __c1, const char_type& __c2)
+      { return __c1 == __c2; }
+
+      static bool 
+      lt(const char_type& __c1, const char_type& __c2)
+      { return __c1 < __c2; }
+
+      static int 
+      compare(const char_type* __s1, const char_type* __s2, size_t __n)
+      { 
+	for (size_t __i = 0; __i < __n; ++__i)
+	  if (!eq(__s1[__i], __s2[__i]))
+	    return lt(__s1[__i], __s2[__i]) ? -1 : 1;
+	return 0; 
+      }
+
+      static size_t
+      length(const char_type* __s)
+      { 
+	const char_type* __p = __s; 
+	while (__p) 
+	  ++__p; 
+	return (__p - __s); 
+      }
+
+      static const char_type* 
+      find(const char_type* __s, size_t __n, const char_type& __a)
+      { 
+	for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p)
+	  if (*__p == __a) return __p;
+	return 0;
+      }
+
+      static char_type* 
+      move(char_type* __s1, const char_type* __s2, size_t __n)
+      { return (char_type*) memmove(__s1, __s2, __n * sizeof(char_type)); }
+
+      static char_type* 
+      copy(char_type* __s1, const char_type* __s2, size_t __n)
+      { return (char_type*) memcpy(__s1, __s2, __n * sizeof(char_type)); }
+
+      static char_type* 
+      assign(char_type* __s, size_t __n, char_type __a)
+      { 
+	for (char_type* __p = __s; __p < __s + __n; ++__p) 
+	  assign(*__p, __a);
+        return __s; 
+      }
+
+      static char_type 
+      to_char_type(const int_type&)
+      { return char_type(); }
+
+      static int_type 
+      to_int_type(const char_type&) { return int_type(); }
+
+      static bool 
+      eq_int_type(const int_type& __c1, const int_type& __c2)
+      { return __c1 == __c2; }
+
+      static int_type 
+      eof() { return static_cast<int_type>(-1); }
+
+      static int_type 
+      not_eof(const int_type& __c)
+      { return eq_int_type(__c, eof()) ? int_type(0) : __c; }
+    };
+} // namespace std
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  // non POD types : resize, capacity, reserve
+  std::basic_string< A<B> > str02;
+  typedef std::basic_string< A<B> >::size_type size_type_o;
+  size_type_o sz03;
+  size_type_o sz04;
+
+  sz03 = str02.capacity();
+  str02.reserve(100);
+  sz04 = str02.capacity();
+  VERIFY( sz04 >= sz03 );
+  VERIFY( sz04 >= 100 );
+  str02.reserve();
+  sz03 = str02.capacity();
+  VERIFY( sz03 == 0 );
+
+  sz03 = str02.size() + 5;
+  str02.resize(sz03);
+  sz04 = str02.size();
+  VERIFY( sz03 == sz04 );
+
+  sz03 = str02.size() - 5;
+  str02.resize(sz03);
+  sz04 = str02.size();
+  VERIFY( sz03 == sz04 );
+
+  A<B> inst_obj;
+  std::basic_string<A<B> > str07(30, inst_obj);
+  std::basic_string<A<B> > str08 = str07;
+  str07 = str08 + str07;
+  VERIFY( str07.capacity() >= str07.size() );
+  VERIFY( str08.capacity() >= str08.size() );
+
+  // non-POD types: size, length, max_size, clear(), empty()
+  bool b01 = str02.empty();  
+  VERIFY( b01 == true );
+  sz03 = str02.size();
+  sz04 = str02.length();
+  VERIFY( sz03 == sz04 );
+  str02.c_str();
+  sz03 = str02.size();
+  sz04 = str02.length();
+  VERIFY( sz03 == sz04 );
+
+  sz03 = str02.max_size();  
+  VERIFY( sz03 >= sz04 );
+
+  sz03 = str02.size();
+  str02.clear();  
+  b01 = str02.empty(); 
+  VERIFY( b01 == true );
+  sz04 = str02.size();  
+  VERIFY( sz03 >= sz04 );
+}
+
+#if !__GXX_WEAK__
+// Explicitly instantiate for systems with no COMDAT or weak support.
+template 
+  const std::basic_string< A<B> >::size_type 
+  std::basic_string< A<B> >::_Rep::_S_max_size;
+
+template 
+  const A<B>
+  std::basic_string< A<B> >::_Rep::_S_terminal;
+#endif
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/1.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/1.cc
new file mode 100644
index 000000000..2bd36ebf9
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/1.cc
@@ -0,0 +1,99 @@
+// 1999-05-11 bkoz
+
+// Copyright (C) 1999, 2002, 2003, 2004, 2009 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/>.
+
+// 21.3.3 string capacity
+
+#include <string>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  // POD types : resize, capacity, reserve
+  bool test __attribute__((unused)) = true;
+  std::string str01;
+  typedef std::string::size_type size_type_s;
+
+  size_type_s sz01 = str01.capacity();
+  str01.reserve(100);
+  size_type_s sz02 = str01.capacity();
+  VERIFY( sz02 >= sz01 );
+  VERIFY( sz02 >= 100 );
+  str01.reserve();
+  sz01 = str01.capacity();
+  VERIFY( sz01 == 0 );
+
+  sz01 = str01.size() + 5;
+  str01.resize(sz01);
+  sz02 = str01.size();
+  VERIFY( sz01 == sz02 );
+
+  sz01 = str01.size() - 5;
+  str01.resize(sz01);
+  sz02 = str01.size();
+  VERIFY( sz01 == sz02 );
+
+  std::string str05(30, 'q');
+  std::string str06 = str05;
+  str05 = str06 + str05;
+  VERIFY( str05.capacity() >= str05.size() );
+  VERIFY( str06.capacity() >= str06.size() );
+
+  // POD types: size, length, max_size, clear(), empty()
+  bool b01;
+  std::string str011;
+  b01 = str01.empty();  
+  VERIFY( b01 == true );
+  sz01 = str01.size();
+  sz02 = str01.length();
+  VERIFY( sz01 == sz02 );
+  str01.c_str();
+  sz01 = str01.size();
+  sz02 = str01.length();
+  VERIFY( sz01 == sz02 );
+
+  sz01 = str01.length();
+  str01.c_str();
+  str011 = str01 +  "_addendum_";
+  str01.c_str();
+  sz02 = str01.length();    
+  VERIFY( sz01 == sz02 );
+  sz02 = str011.length();
+  VERIFY( sz02 > sz01 );
+    
+  // trickster allocator issues involved with these:
+  std::string str3 = "8-chars_8-chars_";
+  std::string str4 = str3 + "7-chars";
+  
+  sz01 = str01.size();
+  sz02 = str01.max_size();  
+  VERIFY( sz02 >= sz01 );
+
+  sz01 = str01.size();
+  str01.clear();  
+  b01 = str01.empty(); 
+  VERIFY( b01 == true );
+  sz02 = str01.size();  
+  VERIFY( sz01 >= sz02 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/18654.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/18654.cc
new file mode 100644
index 000000000..e9fa200a5
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/18654.cc
@@ -0,0 +1,55 @@
+// 2004-11-29  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 2009 Free Software Foundation
+//
+// 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/>.
+
+// 21.3.3 string capacity
+
+#include <string>
+#include <testsuite_hooks.h>
+
+// libstdc++/18654
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef string::size_type size_type;
+
+  // Our current implementation provides exact shrink-to-size
+  // and shrink-to-fit (in the future, maybe this will change
+  // for short strings).
+  const size_type minsize = 2 << 0;
+  const size_type maxsize = 2 << 20;
+  for (size_type i = minsize; i <= maxsize; i *= 2)
+    {
+      string str(i, 'x');
+      str.reserve(3 * i);
+
+      str.reserve(2 * i);
+      VERIFY( str.capacity() == 2 * i );
+
+      str.reserve();
+      VERIFY( str.capacity() == i );
+    }
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/2.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/2.cc
new file mode 100644
index 000000000..dd7574b45
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/2.cc
@@ -0,0 +1,42 @@
+// 1999-05-11 bkoz
+
+// Copyright (C) 1999, 2002, 2003, 2009 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/>.
+
+// 21.3.3 string capacity
+
+#include <string>
+#include <testsuite_hooks.h>
+
+// libstdc++/4548
+// http://gcc.gnu.org/ml/libstdc++/2001-11/msg00150.html
+void test02()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::string str01 = "twelve chars";
+  // str01 becomes shared
+  std::string str02 = str01;
+  str01.reserve(1);
+  VERIFY( str01.capacity() == 12 );
+}
+
+int main()
+{
+  test02();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/shrink_to_fit.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/shrink_to_fit.cc
new file mode 100644
index 000000000..cd0d4eb51
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/shrink_to_fit.cc
@@ -0,0 +1,42 @@
+// { dg-options "-std=gnu++0x" }
+
+// 2010-01-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 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/>.
+
+#include <string>
+#include <testsuite_hooks.h>
+
+// libstdc++/42573
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::string s(100, 'a');
+  s.push_back('b');
+  s.push_back('b');
+  VERIFY( s.size() < s.capacity() );
+  s.shrink_to_fit();
+  VERIFY( s.size() == s.capacity() );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/1.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/1.cc
new file mode 100644
index 000000000..427240235
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/1.cc
@@ -0,0 +1,99 @@
+// 1999-05-11 bkoz
+
+// Copyright (C) 1999, 2002, 2003, 2004, 2009 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/>.
+
+// 21.3.3 string capacity
+
+#include <string>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  // POD types : resize, capacity, reserve
+  bool test __attribute__((unused)) = true;
+  std::wstring str01;
+  typedef std::wstring::size_type size_type_s;
+
+  size_type_s sz01 = str01.capacity();
+  str01.reserve(100);
+  size_type_s sz02 = str01.capacity();
+  VERIFY( sz02 >= sz01 );
+  VERIFY( sz02 >= 100 );
+  str01.reserve();
+  sz01 = str01.capacity();
+  VERIFY( sz01 == 0 );
+
+  sz01 = str01.size() + 5;
+  str01.resize(sz01);
+  sz02 = str01.size();
+  VERIFY( sz01 == sz02 );
+
+  sz01 = str01.size() - 5;
+  str01.resize(sz01);
+  sz02 = str01.size();
+  VERIFY( sz01 == sz02 );
+
+  std::wstring str05(30, L'q');
+  std::wstring str06 = str05;
+  str05 = str06 + str05;
+  VERIFY( str05.capacity() >= str05.size() );
+  VERIFY( str06.capacity() >= str06.size() );
+
+  // POD types: size, length, max_size, clear(), empty()
+  bool b01;
+  std::wstring str011;
+  b01 = str01.empty();  
+  VERIFY( b01 == true );
+  sz01 = str01.size();
+  sz02 = str01.length();
+  VERIFY( sz01 == sz02 );
+  str01.c_str();
+  sz01 = str01.size();
+  sz02 = str01.length();
+  VERIFY( sz01 == sz02 );
+
+  sz01 = str01.length();
+  str01.c_str();
+  str011 = str01 +  L"_addendum_";
+  str01.c_str();
+  sz02 = str01.length();    
+  VERIFY( sz01 == sz02 );
+  sz02 = str011.length();
+  VERIFY( sz02 > sz01 );
+    
+  // trickster allocator issues involved with these:
+  std::wstring str3 = L"8-chars_8-chars_";
+  std::wstring str4 = str3 + L"7-chars";
+  
+  sz01 = str01.size();
+  sz02 = str01.max_size();  
+  VERIFY( sz02 >= sz01 );
+
+  sz01 = str01.size();
+  str01.clear();  
+  b01 = str01.empty(); 
+  VERIFY( b01 == true );
+  sz02 = str01.size();  
+  VERIFY( sz01 >= sz02 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc
new file mode 100644
index 000000000..fd5117576
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc
@@ -0,0 +1,55 @@
+// 2004-11-29  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 2009 Free Software Foundation
+//
+// 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/>.
+
+// 21.3.3 string capacity
+
+#include <string>
+#include <testsuite_hooks.h>
+
+// libstdc++/18654
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef wstring::size_type size_type;
+
+  // Our current implementation provides exact shrink-to-size
+  // and shrink-to-fit (in the future, maybe this will change
+  // for short strings).
+  const size_type minsize = 2 << 0;
+  const size_type maxsize = 2 << 20;
+  for (size_type i = minsize; i <= maxsize; i *= 2)
+    {
+      wstring str(i, L'x');
+      str.reserve(3 * i);
+
+      str.reserve(2 * i);
+      VERIFY( str.capacity() == 2 * i );
+
+      str.reserve();
+      VERIFY( str.capacity() == i );
+    }
+}
+
+int main() 
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/2.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/2.cc
new file mode 100644
index 000000000..564a3219f
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/2.cc
@@ -0,0 +1,42 @@
+// 1999-05-11 bkoz
+
+// Copyright (C) 1999, 2002, 2003, 2009 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/>.
+
+// 21.3.3 string capacity
+
+#include <string>
+#include <testsuite_hooks.h>
+
+// libstdc++/4548
+// http://gcc.gnu.org/ml/libstdc++/2001-11/msg00150.html
+void test02()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::wstring str01 = L"twelve chars";
+  // str01 becomes shared
+  std::wstring str02 = str01;
+  str01.reserve(1);
+  VERIFY( str01.capacity() == 12 );
+}
+
+int main()
+{
+  test02();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/shrink_to_fit.cc b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/shrink_to_fit.cc
new file mode 100644
index 000000000..88f7c0ab0
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/shrink_to_fit.cc
@@ -0,0 +1,42 @@
+// { dg-options "-std=gnu++0x" }
+
+// 2010-01-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 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/>.
+
+#include <string>
+#include <testsuite_hooks.h>
+
+// libstdc++/42573
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::wstring s(100, L'a');
+  s.push_back(L'b');
+  s.push_back(L'b');
+  VERIFY( s.size() < s.capacity() );
+  s.shrink_to_fit();
+  VERIFY( s.size() == s.capacity() );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}