26 lines
453 B
Rust
26 lines
453 B
Rust
#![deny(deref_into_dyn_supertrait)]
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use std::ops::Deref;
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// issue 89190
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trait A {}
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trait B: A {}
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impl<'a> Deref for dyn 'a + B {
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//~^ ERROR this `Deref` implementation is covered by an implicit supertrait coercion
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//~| WARN this will change its meaning in a future release!
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type Target = dyn A;
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fn deref(&self) -> &Self::Target {
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todo!()
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}
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}
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fn take_a(_: &dyn A) {}
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fn whoops(b: &dyn B) {
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take_a(b)
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}
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fn main() {}
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