Issue #5319: Print an error if flushing stdout fails at interpreter

shutdown.

Misc/NEWS

@@ -12,6 +12,9 @@ What's New in Python 3.2 Alpha 2?
 Core and Builtins
 -----------------
 
+- Issue #5319: Print an error if flushing stdout fails at interpreter
+  shutdown.
+
 - Issue #9337: The str() of a float or complex number is now identical
   to its repr().
 

Python/pythonrun.c

@@ -320,7 +320,7 @@ flush_std_files(void)
     if (fout != NULL && fout != Py_None) {
         tmp = PyObject_CallMethod(fout, "flush", "");
         if (tmp == NULL)
-            PyErr_Clear();
+            PyErr_WriteUnraisable(fout);
         else
             Py_DECREF(tmp);
     }