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Rollup merge of rust-lang#96730 - JohnTitor:unused-lifetimes-tests, r…
…=compiler-errors Add a regression test for rust-lang#64173 and rust-lang#66152 Closes rust-lang#64173 Closes rust-lang#66152 Mixed the code as the root cause seems the same.
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use std::mem::size_of; | ||
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struct Foo<'s> { //~ ERROR: parameter `'s` is never used | ||
array: [(); size_of::<&Self>()], | ||
//~^ ERROR: generic `Self` types are currently not permitted in anonymous constants | ||
} | ||
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// The below is taken from https://github.com/rust-lang/rust/issues/66152#issuecomment-550275017 | ||
// as the root cause seems the same. | ||
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const fn foo<T>() -> usize { | ||
0 | ||
} | ||
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struct Bar<'a> { //~ ERROR: parameter `'a` is never used | ||
beta: [(); foo::<&'a ()>()], //~ ERROR: a non-static lifetime is not allowed in a `const` | ||
} | ||
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fn main() {} |
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error[E0658]: a non-static lifetime is not allowed in a `const` | ||
--> $DIR/issue-64173-unused-lifetimes.rs:16:23 | ||
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LL | beta: [(); foo::<&'a ()>()], | ||
| ^^ | ||
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= note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information | ||
= help: add `#![feature(generic_const_exprs)]` to the crate attributes to enable | ||
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error: generic `Self` types are currently not permitted in anonymous constants | ||
--> $DIR/issue-64173-unused-lifetimes.rs:4:28 | ||
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LL | array: [(); size_of::<&Self>()], | ||
| ^^^^ | ||
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error[E0392]: parameter `'s` is never used | ||
--> $DIR/issue-64173-unused-lifetimes.rs:3:12 | ||
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LL | struct Foo<'s> { | ||
| ^^ unused parameter | ||
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= help: consider removing `'s`, referring to it in a field, or using a marker such as `PhantomData` | ||
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error[E0392]: parameter `'a` is never used | ||
--> $DIR/issue-64173-unused-lifetimes.rs:15:12 | ||
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LL | struct Bar<'a> { | ||
| ^^ unused parameter | ||
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= help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData` | ||
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error: aborting due to 4 previous errors | ||
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Some errors have detailed explanations: E0392, E0658. | ||
For more information about an error, try `rustc --explain E0392`. |