Regression in the call function with a map argument

[xzyfer]

When call is passed a maps as the $args param it is being auto expanded. This should only happen if the map value is followed by ... i.e. call('foo', $my-map...) vs call('foo', $my-map). Originally reported #1128 (comment)

@function foo($map) {
  @return $map;
}

@debug(call(foo, (this: is, my: map));)

Ruby Sass + Libsass 3.1.0

test.scss:20 DEBUG: (this: is, my: map)

Libsass 3.2.0-beta.6

Error: function foo has no parameter named $this
        on line 20 of test.scss
>> @debug(call(foo, (this: is, my: map)));
   ------------------------------------^

Specs added sass/sass-spec#342