MODULE@0..18
  VAR_DECL@0..17
    IDENT@0..3 "let"
    WHITESPACE@3..4 " "
    DECLARATOR@4..16
      SINGLE_PATTERN@4..5
        NAME@4..5
          IDENT@4..5 "s"
      WHITESPACE@5..6 " "
      EQ@6..7 "="
      WHITESPACE@7..8 " "
      ERROR@8..16
        ERROR_TOKEN@8..16 "\"\\u{200\""
    SEMICOLON@16..17 ";"
  WHITESPACE@17..18 "\n"
--
error: expected hex digits for a unicode code point escape, but encountered an invalid character
  ┌─ unterminated_unicode_codepoint.js:1:16
  │
1 │ let s = "\u{200";
  │                ^

--
let s = "\u{200";