Clippy lints / Restriction
Clippy lint · Restriction · checked with Clippy 0.1.99
clippy::use_debug: Checks for usage of Debug formatting
What it meansChecks for usage of Debug formatting. The purpose of this lint is to catch debugging remnants. It is in the restriction group and off by default.
Does it matter?
The purpose of the Debug trait is to facilitate debugging Rust code, and no guarantees are made about its output. It should not be used in user-facing output.
Lints that forbid language features for specific codebases (no unwrap, no indexing...). Off by default; pick them one by one, never the whole group.
How to fix it
Clippy does not fix this one automatically. Change the code by hand:
Flagged
println!("{:?}", foo);
Turn it off, or on
It is off by default. To use it, set it to warn or deny:
Whole crate (Cargo.toml)
[lints.clippy]
use_debug = "warn"In code
#![warn(clippy::use_debug)]One run
cargo clippy -- -W clippy::use-debugThe [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.
Clippy's own documentation
What it does
Checks for usage of Debug formatting. The purpose of this
lint is to catch debugging remnants.
Why restrict this?
The purpose of the Debug trait is to facilitate debugging Rust code,
and no guarantees are made about its output.
It should not be used in user-facing output.
Example
println!("{:?}", foo);
From the Clippy lint list (0.1.99), part of the Rust project, MIT or Apache-2.0. Official entry.
Related lints
- unwrap_usedChecks for .unwrap() or .unwrap_err() calls on Results and .unwrap() call on Options
- module_name_repetitionsDetects public item names that are prefixed or suffixed by the containing public module’s name
- expect_usedChecks for .expect() or .expect_err() calls on Results and .expect() call on Options
- unused_trait_namesimporting trait that is only used anonymously
- unwrap_in_result`expect` used in a function that returns a `Result`
- verbose_file_readsChecks for usage of File::read_to_end and File::read_to_string
- wildcard_enum_match_armChecks for wildcard enum matches using _
All 847 Clippy lints · Rust compiler errors · Cargo.toml checker
Up next
Related lintclippy::unwrap_usedChecks for .unwrap() or .unwrap_err() calls on Results and .unwrap() call on OptionsRead it next →Did this answer your question?