LWG 2135: terminate() in condition_variable::wait()

	* include/std/condition_variable (condition_variable::wait): Add
	noexcept.
	* src/c++11/condition_variable.cc (condition_variable::wait): Call
	std::terminate on error (DR 2135).

From-SVN: r228217

libstdc++-v3/ChangeLog

+2015-09-28  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/std/condition_variable (condition_variable::wait): Add
+	noexcept.
+	* src/c++11/condition_variable.cc (condition_variable::wait): Call
+	std::terminate on error (DR 2135).
+
 2015-09-25  Ville Voutilainen  <ville.voutilainen@gmail.com>
 
 	Avoid creating dangling references in case of nested tuples

libstdc++-v3/include/std/condition_variable

@@ -89,7 +89,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     notify_all() noexcept;
 
     void
-    wait(unique_lock<mutex>& __lock);
+    wait(unique_lock<mutex>& __lock) noexcept;
 
     template<typename _Predicate>
       void

libstdc++-v3/src/c++11/condition_variable.cc

@@ -48,12 +48,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   }
 
   void
-  condition_variable::wait(unique_lock<mutex>& __lock)
+  condition_variable::wait(unique_lock<mutex>& __lock) noexcept
   {
     int __e = __gthread_cond_wait(&_M_cond, __lock.mutex()->native_handle());
 
     if (__e)
-      __throw_system_error(__e);
+      std::terminate();
   }
 
   void