14 lines
337 B
Rust
14 lines
337 B
Rust
#![feature(dyn_star, trait_upcasting)]
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//~^ WARN the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
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trait A: B {}
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trait B {}
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impl A for usize {}
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impl B for usize {}
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fn main() {
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let x: Box<dyn* A> = Box::new(1usize as dyn* A);
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let y: Box<dyn* B> = x;
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//~^ ERROR mismatched types
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}
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