mirror of https://github.com/rust-lang/rust
22 lines
667 B
Rust
22 lines
667 B
Rust
// This test checks that the error messages you get for this example
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// at least mention `'a` and `'static`. The precise messages can drift
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// over time, but this test used to exhibit some pretty bogus messages
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// that were not remotely helpful.
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//@ error-pattern:argument requires that `'a` must outlive `'static`
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struct Invariant<'a>(Option<&'a mut &'a mut ()>);
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fn mk_static() -> Invariant<'static> { Invariant(None) }
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fn unify<'a>(x: Option<Invariant<'a>>, f: fn(Invariant<'a>)) {
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let bad = if x.is_some() {
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x.unwrap() //~ ERROR borrowed data escapes outside of function [E0521]
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} else {
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mk_static()
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};
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f(bad);
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}
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fn main() {}
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