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#![feature(type_alias_impl_trait)]
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#![deny(improper_ctypes)]
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pub trait Baz {}
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impl Baz for u32 {}
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type Qux = impl Baz;
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fn assign() -> Qux {
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3
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}
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#[repr(C)]
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pub struct A {
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x: Qux,
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}
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extern "C" {
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pub fn lint_me() -> A; //~ ERROR: uses type `Qux`
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}
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fn main() {}
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