There may be a memory leak

[123shang60]

What version of regex are you using?

1.4.3

Describe the bug at a high level.

When used in large quantities, the memory will continue to grow

What are the steps to reproduce the behavior?

use regex::bytes::Regex;

fn main() {
    loop {
        let input = "NGS>";
        let reg = Regex::new(r#"(?m)(\x1b|\[[0-9;]*[a-zA-Z])"#).unwrap();
        let _ = reg.replace_all(input.as_bytes(), "".as_bytes());
    }
}

What is the actual behavior?

After running for 10 minutes, the memory consumption increased to 1GB.

[BurntSushi]

Does this still happen if you disable all features except for std?

[123shang60]

yes

[Marwes]

Seems to be an older regression. So far I have bisected this to have been introduced in 1.3.3 . 1.3.2...1.3.3 only shows a dependency update on thread_local

[Marwes]

Digging deeper this seems to be a regression in thread_local 1.1.1

[BurntSushi]

I suspected as much, which is why I asked if the leak occurred with all features except for std disabled. That would disable the use of thread_local.

I believe thread_local 1.1.1 had some big changes internally. cc @Amanieu

[Marwes]

Made a fix Amanieu/thread_local-rs#30

[Marwes]

Now released in 1.1.3 so this could be closed