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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,21 @@ | ||
//! Make sure we error on erroneous consts even if they are unused. | ||
#![warn(const_err, unconditional_panic)] | ||
|
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struct PrintName<T>(T); | ||
impl<T> PrintName<T> { | ||
const VOID: () = [()][2]; //~WARN any use of this value will cause an error | ||
//~^ WARN this operation will panic at runtime | ||
//~| WARN this was previously accepted by the compiler but is being phased out | ||
} | ||
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pub static FOO: () = { | ||
if false { | ||
// This bad constant is only used in dead code in a static initializer... and yet we still | ||
// must make sure that the build fails. | ||
let _ = PrintName::<i32>::VOID; //~ERROR could not evaluate static initializer | ||
} | ||
}; | ||
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fn main() { | ||
FOO | ||
} |
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Original file line number | Diff line number | Diff line change |
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warning: this operation will panic at runtime | ||
--> $DIR/erroneous-const2.rs:6:22 | ||
| | ||
LL | const VOID: () = [()][2]; | ||
| ^^^^^^^ index out of bounds: the length is 1 but the index is 2 | ||
| | ||
note: the lint level is defined here | ||
--> $DIR/erroneous-const2.rs:2:20 | ||
| | ||
LL | #![warn(const_err, unconditional_panic)] | ||
| ^^^^^^^^^^^^^^^^^^^ | ||
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warning: any use of this value will cause an error | ||
--> $DIR/erroneous-const2.rs:6:22 | ||
| | ||
LL | const VOID: () = [()][2]; | ||
| -----------------^^^^^^^- | ||
| | | ||
| index out of bounds: the length is 1 but the index is 2 | ||
| | ||
note: the lint level is defined here | ||
--> $DIR/erroneous-const2.rs:2:9 | ||
| | ||
LL | #![warn(const_err, unconditional_panic)] | ||
| ^^^^^^^^^ | ||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! | ||
= note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800> | ||
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error[E0080]: could not evaluate static initializer | ||
--> $DIR/erroneous-const2.rs:15:17 | ||
| | ||
LL | let _ = PrintName::<i32>::VOID; | ||
| ^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors | ||
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error: aborting due to previous error; 2 warnings emitted | ||
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For more information about this error, try `rustc --explain E0080`. |