mirror of https://github.com/rust-lang/rust
19 lines
397 B
Rust
19 lines
397 B
Rust
// Check that we do not allow casts or coercions
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// to object unsafe trait objects inside a Box
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#![feature(object_safe_for_dispatch)]
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trait Trait: Sized {}
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struct S;
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impl Trait for S {}
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fn takes_box(t: Box<dyn Trait>) {}
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fn main() {
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Box::new(S) as Box<dyn Trait>; //~ ERROR E0038
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let t_box: Box<dyn Trait> = Box::new(S); //~ ERROR E0038
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takes_box(Box::new(S)); //~ ERROR E0038
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}
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