SCSS interpolation is not supported

Hello,

for some time (I've been lazy/busy to report) the following code compiles fine, but marks SCSS files in editor as broken.

Example code:

$i: 1;
.selector
{
    &--#{$i}    // <-- Unexpected token HASH_SYMBOL found
    {
        ...
    }
    &__#{$i}    // <-- Unexpected token IDENT found
    {
        ...
    }
}

The real problem is, when a file is marked as with errors, compiler does not always detect changes and does not recompile when some of imported files changes.