20 lines
590 B
Rust
20 lines
590 B
Rust
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//@ check-pass
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//@ compile-flags: -Znext-solver
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trait Reader: Default {
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fn read_u8_array<A>(&self) -> Result<A, ()> {
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todo!()
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}
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fn read_u8(&self) -> Result<u8, ()> {
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let a: [u8; 1] = self.read_u8_array::<_>()?;
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// This results in a nested `<Result<?0, ()> as Try>::Residual: Sized` goal.
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// The self type normalizes to `?0`. We previously did not force that to be
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// ambiguous but instead incompletely applied the `Self: Sized` candidate
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// from the `ParamEnv`, resulting in a type error.
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Ok(a[0])
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}
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}
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fn main() {}
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