mirror of https://github.com/rust-lang/rust
16 lines
404 B
Rust
16 lines
404 B
Rust
// Test that the NLL `relate_tys` code correctly deduces that a
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// function returning either argument CANNOT be upcast to one
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// that returns always its first argument.
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//
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//@ compile-flags:-Zno-leak-check
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fn make_it() -> fn(&'static u32) -> &'static u32 {
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panic!()
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}
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fn main() {
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let a: fn(_) -> _ = make_it();
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let b: fn(&u32) -> &u32 = a; //~ ERROR mismatched types [E0308]
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drop(a);
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}
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