rustbacktrace

Is it possible to print a backtrace in Rust without panicking?

Is it possible to print a backtrace (assuming RUST_BACKTRACE is enabled) without panicking? It seems that the only way of doing that is calling via panic!. If not, is there a reason for it?

Solution

  • You can use std::backtrace::Backtrace since rust 1.65.0:

    use std::backtrace::Backtrace;

fn main() {
    // Print backtrace if either RUST_BACKTRACE or RUST_LIB_BACKTRACE is set
    println!("Custom backtrace: {}", Backtrace::capture());

    // or forcibly capture the backtrace regardless of environment variable configuration
    println!("Custom backtrace: {}", Backtrace::force_capture());
}

    Documentation: https://doc.rust-lang.org/std/backtrace/struct.Backtrace.html