22 lines
870 B
Rust
22 lines
870 B
Rust
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// Regression test for issue #87199, where attempting to relax a bound
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// other than the only supported `?Sized` would still cause the compiler
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// to assume that the `Sized` bound was relaxed.
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// check-fail
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// Check that these function definitions only emit warnings, not errors
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fn arg<T: ?Send>(_: T) {}
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//~^ warning: default bound relaxed for a type parameter, but this does nothing
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//~^^ the size for values of type `T`
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fn ref_arg<T: ?Send>(_: &T) {}
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//~^ warning: default bound relaxed for a type parameter, but this does nothing
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fn ret() -> impl Iterator<Item = ()> + ?Send { std::iter::empty() }
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//~^ warning: default bound relaxed for a type parameter, but this does nothing
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//~^^ the size for values of type `impl Iterator+?Sized` cannot be known
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// Check that there's no `?Sized` relaxation!
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fn main() {
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ref_arg::<i32>(&5);
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ref_arg::<[i32]>(&[5]);
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}
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