<===> single_equals/no_lhs/input.scss
a {b: c(=d)}

<===> single_equals/no_lhs/error
Error: expected ")".
  ,
1 | a {b: c(=d)}
  |         ^
  '
  input.scss 1:9  root stylesheet

<===> single_equals/no_lhs/error-libsass
Error: Invalid CSS after "a {b: c(": expected expression (e.g. 1px, bold), was "=d)}"
        on line 1:8 of input.scss
>> a {b: c(=d)}

   -------^

<===>
================================================================================
<===> single_equals/no_rhs/input.scss
a {b: c(d=)}

<===> single_equals/no_rhs/error
Error: Expected expression.
  ,
1 | a {b: c(d=)}
  |           ^
  '
  input.scss 1:11  root stylesheet

<===> single_equals/no_rhs/error-libsass
Error: Invalid CSS after "a {b: c(d": expected expression (e.g. 1px, bold), was "=)}"
        on line 1:9 of input.scss
>> a {b: c(d=)}

   --------^

<===>
================================================================================
<===> single_equals/no_lhs_or_rhs/input.scss
a {b: c(=)}

<===> single_equals/no_lhs_or_rhs/error
Error: expected ")".
  ,
1 | a {b: c(=)}
  |         ^
  '
  input.scss 1:9  root stylesheet

<===> single_equals/no_lhs_or_rhs/error-libsass
Error: Invalid CSS after "a {b: c(": expected expression (e.g. 1px, bold), was "=)}"
        on line 1:8 of input.scss
>> a {b: c(=)}

   -------^