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Regexp::new exception error #1244
Description
What version of regex are you using?
If it isn't the latest version, then please upgrade and check whether the bug
is still present.
1.11.1
Describe the bug at a high level.
Give a brief description of the actual problem you're observing.
I'm getting regular expressions from the nmap fingerprint library, but when I use them individually, the regular expressions work, but when I create them through a loop, I get the error: Backreferences are not supported.
What are the steps to reproduce the behavior?
This section should almost always provide a COMPLETE Rust program that others
can compile and run with Cargo. It should be as small as possible.
If providing a small and simple reproduction is not easy, please explain why
and the maintainers will help you figure out next steps.
https://github.com/nmap/nmap/blob/master/nmap-service-probes nmap-service-probes.txt
use regex::Regex;
#[cfg(test)]
mod test{
use super::*;
#[test]
fn test_t_reg(){
compile();
}
}
fn compile(){
let mut file = OpenOptions::new().append(true).create(true).open("res.txt").unwrap();
let date:String = "\u{5}\0\r\u{3}\u{10}\0\0\0\u{18}\0\0\0\0\u{8}\u{1}@\u{4}\0\u{1}\u{5}\0\0\0\0".parse().unwrap();
let mut matten:Vec<String> =Vec::new();
let nsp_str = include_str!("../nmap-service-probes.txt");
let mut nsp_lines = Vec::new();
for l in nsp_str.lines() {
nsp_lines.push(l.to_string());
}
for line in nsp_lines {
if line.contains("#") {
continue;
} else if line.contains("Exclude") {
continue;
}
if line.starts_with("match"){
let line_split: Vec<&str> = line.split(" ").collect();
let line_other = line_split[2..].to_vec().join(" ");
let line_other_replace = line_other.replace("|s", "|");
let line_other_split: Vec<&str> = line_other_replace.split("|").collect();
let pattern = line_other_split[1].to_string();
// println!("{}", pattern);
matten.push(pattern);
}
}
let mut true_patten:Vec<String> = Vec::new();
// let set = RegexSet::new(matten.clone()).unwrap();
// let matches: Vec<_> = set.matches(&date).into_iter().collect();
for ma in matten.clone() {
match Regex::new(&ma) {
Ok(re) => {
true_patten.push(ma)
},
Err(e) => {
if ma.contains("0....") {
println!("Regex Error: {:?}", e);
println!("Regex Error: {}", ma);
}
// println!("Regex Error: {}", ma);
continue
}
}
}
let test = Regex::new("^\x05\0\r\x03\x10\0\0\0\x18\0\0\0....\x04\0\x01\x05\0...$").unwrap();
let res = test.captures(&date);
println!("{:?}", res);
}
What is the actual behavior?
If you provide a Rust program in the previous section, then this should be the
output of that program.
What is the expected behavior?
What do you expect the output to be?
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