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