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Add test of underscore variable in format string

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David Tolnay 2024-11-04 15:15:44 -05:00
parent 6b48b090f8
commit 4d397bc186
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2 changed files with 14 additions and 0 deletions
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7
tests/ui/display-underscore.rs Normal file
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@ -0,0 +1,7 @@
use thiserror::Error;
#[derive(Error, Debug)]
#[error("{_}")]
pub struct Error;
fn main() {}

7
tests/ui/display-underscore.stderr Normal file
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@ -0,0 +1,7 @@
error: invalid format string: invalid argument name `_`
--> tests/ui/display-underscore.rs:4:11
|
4 | #[error("{_}")]
| ^ invalid argument name in format string
|
= note: argument name cannot be a single underscore