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10 lines
344 B
Rust
10 lines
344 B
Rust
#![feature(trait_alias)]
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trait Foo = std::io::Read + std::io::Write;
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fn main() {
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let _: Box<dyn std::io::Read + std::io::Write>;
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//~^ ERROR only auto traits can be used as additional traits in a trait object [E0225]
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let _: Box<dyn Foo>;
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//~^ ERROR only auto traits can be used as additional traits in a trait object [E0225]
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}
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