Special cased KeyboardInterrupt

letsencrypt/cli.py

@@ -676,10 +676,14 @@ def main(cli_args=sys.argv[1:]):
     except errors.Error as error:
         handle_exception_common()
         return error
-    except: # pylint: disable=bare-except
+    except KeyboardInterrupt:
         handle_exception_common()
         # Ensures a new line is printed
         return ""
+    except: # pylint: disable=bare-except
+        handle_exception_common()
+        return ("\nAn unexpected error occured. Please see the logfiles in {0} "
+                "for more details.".format(args.logs_dir))
 
 
 if __name__ == "__main__":

letsencrypt/tests/cli_test.py

@@ -72,6 +72,10 @@ class CLITest(unittest.TestCase):
             self._call(['--debug'] + cmd_arg, attrs)
         self._call(cmd_arg, attrs)
 
+        attrs['view_config_changes.side_effect'] = [ValueError]
+        with self.assertRaises(ValueError):
+            self._call(['--debug'] + cmd_arg, attrs)
+        self._call(cmd_arg, attrs)
 
 if __name__ == '__main__':
     unittest.main()  # pragma: no cover