13 lines
344 B
Rust
13 lines
344 B
Rust
// error-pattern: cannot infer an appropriate lifetime
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use std;
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import std::sync;
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fn main() {
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let x = ~sync::RWlock();
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let mut y = None;
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do x.write_downgrade |write_mode| {
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y = Some(x.downgrade(write_mode));
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}
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// Adding this line causes a method unification failure instead
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// do (&option::unwrap(y)).read { }
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}
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