Clippy lint · Restriction · checked with Clippy 0.1.99

clippy::semicolon_outside_block: Suggests moving the semicolon from a block’s final expression outside of the block

What it meansSuggests moving the semicolon from a block’s final expression outside of the block. It is in the restriction group and off by default.

Does it matter?

For consistency it’s best to have the semicolon inside/outside the block. Either way is fine and this lint suggests outside the block. Take a look at semicolon_inside_block for the other alternative.

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 can fix this one for you: run cargo clippy --fix (add --allow-dirty if you have uncommitted changes). Review the diff before you commit.

Flagged

unsafe { f(x); }

Write this instead

unsafe { f(x) };

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]
semicolon_outside_block = "warn"

In code

#![warn(clippy::semicolon_outside_block)]

One run

cargo clippy -- -W clippy::semicolon-outside-block

The [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.

Settings in clippy.toml

semicolon-outside-block-ignore-multiline: Whether to lint only if it’s singleline.

Restrictiongroup

allowdefault level

yesfixed by cargo clippy --fix

1.68.0added in Rust

Clippy's own documentation

What it does

Suggests moving the semicolon from a block’s final expression outside of the block.

Why restrict this?

For consistency it’s best to have the semicolon inside/outside the block. Either way is fine and this lint suggests outside the block. Take a look at semicolon_inside_block for the other alternative.

Example

unsafe { f(x); }

Use instead:

unsafe { f(x) };

Configuration

semicolon-outside-block-ignore-multiline: Whether to lint only if it’s singleline.

(default: false)

From the Clippy lint list (0.1.99), part of the Rust project, MIT or Apache-2.0. Official entry.

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