The list of warnings below should NEVER grow. It should gradually shrink to 0.
-CHECK: Warnings without flags (154):
+CHECK: Warnings without flags (153):
CHECK-NEXT: ext_delete_void_ptr_operand
CHECK-NEXT: ext_enum_friend
CHECK-NEXT: ext_expected_semi_decl_list
CHECK-NEXT: warn_call_wrong_number_of_arguments
CHECK-NEXT: warn_case_empty_range
CHECK-NEXT: warn_char_constant_too_large
-CHECK-NEXT: warn_cmdline_missing_macro_defs
CHECK-NEXT: warn_collection_expr_type
CHECK-NEXT: warn_conflicting_param_types
CHECK-NEXT: warn_conflicting_ret_types