28 lines
591 B
Rust
28 lines
591 B
Rust
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// Test that `dyn ... + ?Sized + ...` resulting from the expansion of trait aliases is okay.
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#![feature(trait_alias)]
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trait S = ?Sized;
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// Nest a couple of levels deep:
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trait _0 = S;
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trait _1 = _0;
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// Straight list expansion:
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type _T0 = dyn _1;
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//~^ ERROR at least one non-builtin trait is required for an object type [E0224]
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// In second position:
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type _T1 = dyn Copy + _1;
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// ... and with an auto trait:
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type _T2 = dyn Copy + Send + _1;
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// Twice:
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trait _2 = _1 + _1;
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type _T3 = dyn _2;
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//~^ ERROR at least one non-builtin trait is required for an object type [E0224]
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fn main() {}
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