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38 lines
891 B
Rust
38 lines
891 B
Rust
//@ check-pass
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//@ known-bug: #84533
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// Should fail. Lifetimes are checked correctly when `foo` is called, but NOT
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// when only the lifetime parameters are instantiated.
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use std::marker::PhantomData;
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#[allow(dead_code)]
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fn foo<'b, 'a>() -> PhantomData<&'b &'a ()> {
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PhantomData
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}
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#[allow(dead_code)]
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#[allow(path_statements)]
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fn caller<'b, 'a>() {
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foo::<'b, 'a>;
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}
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// In contrast to above, below code correctly does NOT compile.
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// fn caller<'b, 'a>() {
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// foo::<'b, 'a>();
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// }
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// error: lifetime may not live long enough
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// --> src/main.rs:22:5
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// |
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// 21 | fn caller<'b, 'a>() {
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// | -- -- lifetime `'a` defined here
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// | |
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// | lifetime `'b` defined here
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// 22 | foo::<'b, 'a>();
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// | ^^^^^^^^^^^^^^^ requires that `'a` must outlive `'b`
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// |
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// = help: consider adding the following bound: `'a: 'b`
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fn main() {}
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