57 lines
1.4 KiB
Rust
57 lines
1.4 KiB
Rust
// https://github.com/rust-lang/rust-clippy/issues/3969
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// used to crash: error: internal compiler error:
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// src/librustc_traits/normalize_erasing_regions.rs:43: could not fully normalize `<i32 as
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// std::iter::Iterator>::Item` test from rustc ./ui/trivial-bounds/trivial-bounds-inconsistent.rs
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// Check that tautalogically false bounds are accepted, and are used
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// in type inference.
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#![feature(trivial_bounds)]
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#![allow(unused)]
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trait A {}
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impl A for i32 {}
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struct Dst<X: ?Sized> {
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x: X,
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}
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struct TwoStrs(str, str)
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where
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str: Sized;
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//~^ ERROR: trait bound str: std::marker::Sized does not depend on any type or lifetime
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//~| NOTE: `-D trivial-bounds` implied by `-D warnings`
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fn unsized_local()
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where
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for<'a> Dst<dyn A + 'a>: Sized,
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//~^ ERROR: trait bound for<'a> Dst<(dyn A + 'a)>: std::marker::Sized does not depend
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{
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let x: Dst<dyn A> = *(Box::new(Dst { x: 1 }) as Box<Dst<dyn A>>);
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}
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fn return_str() -> str
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where
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str: Sized,
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//~^ ERROR: trait bound str: std::marker::Sized does not depend on any type or lifetim
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{
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*"Sized".to_string().into_boxed_str()
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}
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fn use_op(s: String) -> String
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where
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String: ::std::ops::Neg<Output = String>,
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//~^ ERROR: trait bound std::string::String: std::ops::Neg does not depend on any type
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{
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-s
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}
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fn use_for()
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where
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i32: Iterator,
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//~^ ERROR: trait bound i32: std::iter::Iterator does not depend on any type or lifeti
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{
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for _ in 2i32 {}
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}
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fn main() {}
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