mirror of https://github.com/rust-lang/rust
25 lines
644 B
Rust
25 lines
644 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() -> for<'a> fn(&'a u32, &'a u32) -> &'a u32 {
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panic!()
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}
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fn foo() {
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let a: for<'a, 'b> fn(&'a u32, &'b u32) -> &'a u32 = make_it();
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//~^ ERROR mismatched types [E0308]
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drop(a);
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}
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fn bar() {
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// The code path for patterns is mildly different, so go ahead and
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// test that too:
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let _: for<'a, 'b> fn(&'a u32, &'b u32) -> &'a u32 = make_it();
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//~^ ERROR mismatched types [E0308]
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}
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fn main() {}
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