by rust-lang

rust-lang / backtrace-rs

Backtraces in Rust

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A library for acquiring backtraces at runtime for Rust. This library aims to enhance the support of the standard library by providing a programmatic interface to work with, but it also supports simply easily printing the current backtrace like libstd's panics.


backtrace = "0.3"


To simply capture a backtrace and defer dealing with it until a later time, you can use the top-level

use backtrace::Backtrace;

fn main() { let bt = Backtrace::new();

// do_some_work();

println!("{:?}", bt);


If, however, you'd like more raw access to the actual tracing functionality, you can use the

functions directly.
fn main() {
    backtrace::trace(|frame| {
        let ip = frame.ip();
        let symbol_address = frame.symbol_address();

    // Resolve this instruction pointer to a symbol name
    backtrace::resolve_frame(frame, |symbol| {
        if let Some(name) = {
            // ...
        if let Some(filename) = symbol.filename() {
            // ...

    true // keep going to the next frame



This project is licensed under either of

  • Apache License, Version 2.0, (LICENSE-APACHE or
  • MIT license (LICENSE-MIT or

at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in backtrace-rs by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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