mirror of https://github.com/rust-lang/rust
26 lines
539 B
Rust
26 lines
539 B
Rust
// Test that attempts to construct infinite types via impl trait fail
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// in a graceful way.
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//
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// Regression test for #38064.
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trait Quux {}
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fn foo() -> impl Quux { //~ ERROR cannot resolve opaque type
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struct Foo<T>(T);
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impl<T> Quux for Foo<T> {}
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Foo(bar())
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}
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fn bar() -> impl Quux { //~ ERROR cannot resolve opaque type
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struct Bar<T>(T);
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impl<T> Quux for Bar<T> {}
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Bar(foo())
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}
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// effectively:
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// struct Foo(Bar);
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// struct Bar(Foo);
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// should produce an error about infinite size
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fn main() { foo(); }
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