i can't figure why regex don't compile

[SMods11]

What version of regex are you using?

1.6.0

Describe the bug at a high level.

my regex \\"vault\\"\\:[\\"]?(\\{.*?data.*?\\}) compile with nodejs but seem to have a problem with this library.

What are the steps to reproduce the behavior?

use regex::Regex;

fn main() {
    let regex = Regex::new(r#"\\"vault\\"\\:[\\"]?(\\{.*?data.*?\\})"#).unwrap();
    let string = r#"roller":{"vault":"{\\"data\\":\\"nac2xYOoNouaNXgx11iiwYLW\\",\\"iv\\":\\"0/h9/3zXRzIALeXu6tHyRA==\\",\\"salt\\":\\"R7eS1IV7k6maUUNivx86OHT/hHhUFpXZgW3Ip1vFp+I=\\"}"}"#;

    let result = regex.captures_iter(string);

    for mat in result {
        println!("{:?}", mat);
    }
}

What is the actual behavior?

hread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Syntax(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
regex parse error:
    \\"vault\\"\\:[\\"]?(\\{.*?data.*?\\})
                            ^
error: repetition quantifier expects a valid decimal
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
)', src\main.rs:4:73

What is the expected behavior?

"vault":"{\\"data\\":\\"nac2xYOoNouaNXgx11iiwYLW\\",\\"iv\\":\\"0/h9/3zXRzIALeXu6tHyRA==\\",\\"salt\\":\\"R7eS1IV7k6maUUNivx86OHT/hHhUFpXZgW3Ip1vFp+I=\\"}

[SMods11]

fixed it with :
let regex = Regex::new("\"vault\":[\"]?(\\{.*?data.*?\\})").unwrap();

sorry with the issue