<===> input.scss
$id: inspect((a,b:c)...)

<===> error
Error: Invalid CSS after "$id: inspect((a,b": expected ")", was ":c)...)"
        on line 1 of input.scss
  Use --trace for backtrace.

<===> error-dart-sass
Error: expected ")".
  ,
1 | $id: inspect((a,b:c)...)
  |                  ^
  '
  input.scss 1:18  root stylesheet

<===> error-libsass
Error: Invalid CSS after "$id: inspect((a,b:": expected ")", was "c)...)"
        on line 1 of input.scss
  Use --trace for backtrace.