Escaped characters in selectors

[qblake]

Hi! I try to compile scss with some escaped characters in id-selector.

host-103:bin blake$ ./sassc -v
sassc: 3.3.3
libsass: 3.3.4-2-g1409
sass2scss: 1.0.5

host-103:bin blake$ cat ./test_style.scss
body#some-\(selector\) {
color: red;
}

And it failed.

host-103:bin blake$ ./sassc ./test_style.scss
Error: Invalid CSS after "body#some-\\": expected "{", was "(selector\\) {"
        on line 1 of test_style.scss
>> body#some-\(selector\) {
   ----^

But with Ruby Sass v3.4.21 it ends successfully https://gist.github.com/qblake/891681ad8ba3791c5112ccfdbe4d387a

[mgreter]

Another similar failing case that works with #1978

#äöü  {
  color: reds;
}