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20 lines
452 B
Rust
20 lines
452 B
Rust
//! Regression test for https://github.com/rust-lang/rust/issues/14399
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//@ run-pass
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// #14399
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// We'd previously ICE if we had a method call whose return
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// value was coerced to a trait object. (v.clone() returns Box<B1>
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// which is coerced to Box<A>).
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#[derive(Clone)]
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struct B1;
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trait A { fn foo(&self) {} } //~ WARN method `foo` is never used
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impl A for B1 {}
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fn main() {
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let v: Box<_> = Box::new(B1);
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let _c: Box<dyn A> = v.clone();
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}
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