Index: Lib/test/test_gdb.py
===================================================================
--- Lib/test/test_gdb.py	(révision 80329)
+++ Lib/test/test_gdb.py	(copie de travail)
@@ -59,7 +59,9 @@
         out, err = subprocess.Popen(
             args, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
             ).communicate()
-        return out.decode('utf-8'), err.decode('utf-8')
+        out = out.decode('utf-8', 'surrogateescape')
+        err = err.decode('utf-8', 'surrogateescape')
+        return out, err
 
     def get_stack_trace(self, source=None, script=None,
                         breakpoint=BREAKPOINT_FN,