The LLDB is unable to step into its library while debugging rust

[QingyaoLin]

Currently, I'm using the latest version of the RUST compiler, VS toolchain, LLDB, but no matter how hard I try, I can't get into the library during debugging, which only shows up in my own code and assembly.I hope I can get your answers and help.Thank you very much.
Example code for rust is as follows:

#[derive(Debug)]
struct Counter {
    count: u32,
}

impl Counter {
    fn new() -> Counter {
        Counter { count: 0 }
    }
}

impl Iterator for Counter {
    type Item = u32; // 指定关联类型为u32
    fn next(&mut self) -> Option<Self::Item> {
        self.count += 1;

        if self.count < 6 {
            Some(self.count)
        } else {
            None
        }
    }
}
fn main() {
    let sum: u32 = Counter::new()
        .zip(Counter::new().skip(1))
        .map(|(a, b)| a * b)
        .filter(|x| x % 3 == 0)
        .sum();
    assert_eq!(18, sum);
}

[vadimcn]

Which library do you want to step into? Rust std? For that you'll need to set up a source mapping:

• Look at the header of the assembly file you have stepped into. The second line will look like this:
  ; Source location: /rustc/<HASH>/library/core/src/convert/mod.rs:539
• Run rustc --print sysroot. It'll output something like /home/<USER>/.rustup/toolchains/<TOOLCHAIN>
• Add "sourceMap": {"/rustc/<HASH>/library": "/home/<USER>/.rustup/toolchains/<TOOLCHAIN>/lib/rustlib/src/rust/library"} to your launch configuration.

Note, though, that std is optimized, so stepping through it will probably be less useful that you are hoping.