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