Master error resolution, compiler diagnostics, and runtime debugging techniques.
Learn to leverage Rust's compiler safety with practical debugging workflows.
Rust's compiler provides detailed error messages. Use --explain flag for exhaustive explanations.
rustc --explain E0507
Fast code analysis without generating objects using cargo check.
cargo check
Debug runtime issues with backtraces and panic messages.
RUST_BACKTRACE=1 cargo run
Common issues and solutions for everyday Rust debugging scenarios.
error[E0505]: cannot move out of `x` in `[x]`, in a `for` loop
|
2 | let x = String::from("hello");
| - move occurs because `x` has type `alloc::string::String`, which does not implement the `Copy` trait
3 | for c in x.chars() {
| ^ value moved here
Solution: Clone the value before using or refactor into separate variables.
let x = String::from("hello");
let x_ref = &x;
for c in x_ref.chars() {
// use c
}
Set breakpoints and inspect memory using GDB for low-level issues.
gdb -q --args target/debug/debugging-rust
(gdb) break main
(gdb) run
(gdb) p x
Implement Debug trait for custom types to customize debug output.
use std::fmt;
#[derive(Debug)]
struct Point {
x: i32,
y: i32,
}
fn main() {
let p = Point { x: 0, y: 0 };
println!("{:?}", p);
}
Integrate with VS Code for type checking, code completion, and diagnostics.
Install Extension