captures_iter and find_iter handle newline differently

[dpk2442]

What version of regex are you using?

1.5.5

Describe the bug at a high level.

When running the same regex against the same input, captures_iter and find_iter yield different results.

What are the steps to reproduce the behavior?

let re = regex::Regex::new("(?m)^([^ ]+?)$").unwrap();
let text = "line1\nline2";

println!("captures_iter");
for cap in re.captures_iter(text) {
    println!("{:?}", cap.get(0).unwrap().as_str());
}

println!("\nfind_iter");
for mat in re.find_iter(text) {
    println!("{:?}", mat.as_str());
}

What is the actual behavior?

captures_iter
"line1"
"line2"

find_iter
"line1"
"\nline2"

What is the expected behavior?

I expected the output if the call to find_iter to be consistent with the output of captures_iter, but one includes the newline character and one does not.

[BurntSushi]

Nice find! This looks like a bug in the lazy DFA. This is fixed in my upcoming changes to the regex internals, which will land once #656 is done.