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21 lines
590 B
Rust
21 lines
590 B
Rust
// Issue #90528: provide helpful suggestions when a trait bound is unsatisfied
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// due to a missed unsizing coercion.
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//
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// This test exercises array literals and a trait implemented on immutable slices.
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trait Read {}
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impl Read for &[u8] {}
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fn wants_read(_: impl Read) {}
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fn main() {
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wants_read([0u8]);
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//~^ ERROR the trait bound `[u8; 1]: Read` is not satisfied
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wants_read(&[0u8]);
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//~^ ERROR the trait bound `&[u8; 1]: Read` is not satisfied
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wants_read(&[0u8][..]);
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wants_read(&mut [0u8]);
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//~^ ERROR the trait bound `&mut [u8; 1]: Read` is not satisfied
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}
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