Err(
    Positioned {
        item: TokenError {
            expected_tokens: [
                Number,
                String,
                Keyword(
                    True,
                ),
                Keyword(
                    False,
                ),
                Keyword(
                    Null,
                ),
                Punctuation(
                    Dollar,
                ),
                Punctuation(
                    BracketL,
                ),
                Punctuation(
                    BraceL,
                ),
            ],
            found: LexerError(
                InvalidString(
                    InvalidUnicodeEscapeSequence(
                        "0xD801 is not a valid code point",
                    ),
                ),
            ),
        },
        position: SourcePosition {
            line: 2,
            col: 21,
        },
    },
)