<===> input.scss
$foo: 1 2 3 blah 4;
foo {
  bar: call(max, $foo...);
}

<===> error
DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
in Sass 4.0. Use call(get-function("max")) instead.

Error: "blah" is not a number for `max'
        on line 3 of spec/libsass-closed-issues/issue_1266/max/input.scss
  Use --trace for backtrace.

<===> error-dart-sass
DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
in Dart Sass 2.0.0. Use call(get-function(max)) instead.

  ,
3 |   bar: call(max, $foo...);
  |        ^^^^^^^^^^^^^^^^^^
  '
    input.scss 3:8  root stylesheet

Error: blah is not a number.
  ,
3 |   bar: call(max, $foo...);
  |        ^^^^^^^^^^^^^^^^^^
  '
  input.scss 3:8  root stylesheet