test_i18ngrep "invalid-ref" err
'
+test_expect_success 'error out early upon -C<n> or --whitespace=<bad>' '
+ test_must_fail git rebase -Cnot-a-number HEAD 2>err &&
+ test_i18ngrep "numerical value" err &&
+ test_must_fail git rebase --whitespace=bad HEAD 2>err &&
+ test_i18ngrep "Invalid whitespace option" err
+'
+
test_done