fix maketrans (RustPython#5824)

Author: youknowone

Lib/test/test_unicode.py

@@ -378,8 +378,6 @@ def test_rindex(self):
         self.assertRaises(ValueError, ('a' * 100).rindex, '\U00100304a')
         self.assertRaises(ValueError, ('\u0102' * 100).rindex, '\U00100304\u0102')
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_maketrans_translate(self):
         # these work with plain translate()
         self.checkequalnofix('bbbc', 'abababc', 'translate',

vm/src/builtins/str.rs

@@ -1416,6 +1416,10 @@ impl PyStr {
                                     "string keys in translate table must be of length 1".to_owned(),
                                 ));
                             }
+                        } else {
+                            return Err(vm.new_type_error(
+                                "keys in translate table must be strings or integers".to_owned(),
+                            ));
                         }
                     }
                     Ok(new_dict.to_pyobject(vm))